diff --git a/js/bullets.js b/js/bullets.js
index fdcd544..924a3ca 100644
--- a/js/bullets.js
+++ b/js/bullets.js
@@ -38,6 +38,7 @@ const b = {
   isModFastSpores: null,
   isModStomp: null,
   modSuperBallNumber: null,
+  modOneSuperBall: null,
   modLaserReflections: null,
   modLaserDamage: null,
   modLaserFieldDrain: null,
@@ -188,13 +189,13 @@ const b = {
     },
     {
       name: "thermal runaway",
-      description: "mobs <strong class='color-e'>explode</strong> when they <strong>die</strong>",
+      description: "mobs <strong class='color-e'>explode</strong> when they <strong>die</strong><br><em>be careful</em>",
       maxCount: 1,
       count: 0,
       allowed() {
-        return b.isModImmuneExplosion
+        return true
       },
-      requires: "electric reactive armour",
+      requires: "",
       effect: () => {
         b.isModExplodeMob = true;
       },
@@ -828,6 +829,38 @@ const b = {
         b.modSuperBallNumber = 4;
       }
     },
+    {
+      name: "super ball",
+      description: "rapidly fire <strong>one</strong> <strong>ball</strong> at a time<br><strong>ammo</strong> costs are reduced by <strong>50%</strong>",
+      maxCount: 1,
+      count: 0,
+      allowed() {
+        return b.haveGunCheck("super balls")
+      },
+      requires: "super balls",
+      effect() {
+        b.modOneSuperBall = true;
+        // current ammo
+        for (i = 0, len = b.guns.length; i < len; i++) { //find which gun 
+          if (b.guns[i].name === "super balls") b.guns[i].ammo = b.guns[i].ammo * 2;
+        }
+        //ammo power ups
+        for (i = 0, len = b.guns.length; i < len; i++) { //find which gun 
+          if (b.guns[i].name === "super balls") b.guns[i].ammoPack = b.guns[i].defaultAmmoPack * 2;
+        }
+      },
+      remove() {
+        b.modOneSuperBall = false;
+        // current ammo
+        for (i = 0, len = b.guns.length; i < len; i++) { //find which gun 
+          if (b.guns[i].name === "super balls") b.guns[i].ammo = Math.floor(b.guns[i].ammo / 2);
+        }
+        //ammo power ups
+        for (i = 0, len = b.guns.length; i < len; i++) { //find which gun 
+          if (b.guns[i].name === "super balls") b.guns[i].ammoPack = b.guns[i].defaultAmmoPack;
+        }
+      }
+    },
     {
       name: "fléchettes cartridges",
       description: "<strong>fléchettes</strong> release <strong>three</strong> needles in each shot<br><strong>ammo</strong> cost are increases by <strong>3x</strong>",
@@ -2165,18 +2198,17 @@ const b = {
       description: "fire <strong>four</strong> balls in a wide arc<br>balls <strong>bounce</strong> with no momentum loss",
       ammo: 0,
       ammoPack: 12,
+      defaultAmmoPack: 12, //use to revert ammoPack after mod changes drop rate
       have: false,
       num: 5,
       isStarterGun: true,
       isEasyToAim: true,
       fire() {
-        mech.fireCDcycle = mech.cycle + Math.floor((mech.crouch ? 25 : 20) * b.modFireRate); // cool down
         b.muzzleFlash(20);
-        // mobs.alert(450);
         const SPEED = mech.crouch ? 40 : 30
-        const SPREAD = mech.crouch ? 0.08 : 0.15
-        let dir = mech.angle - SPREAD * (b.modSuperBallNumber - 1) / 2;
-        for (let i = 0; i < b.modSuperBallNumber; i++) {
+        if (b.modOneSuperBall) {
+          mech.fireCDcycle = mech.cycle + Math.floor((mech.crouch ? 32 : 20) * b.modFireRate / (b.modSuperBallNumber)); // cool down
+          let dir = mech.angle
           const me = bullet.length;
           bullet[me] = Bodies.polygon(mech.pos.x + 30 * Math.cos(mech.angle), mech.pos.y + 30 * Math.sin(mech.angle), 12, 7 * b.modBulletSize, b.fireAttributes(dir, false));
           World.add(engine.world, bullet[me]); //add bullet to world
@@ -2193,7 +2225,29 @@ const b = {
           bullet[me].do = function () {
             this.force.y += this.mass * 0.001;
           };
-          dir += SPREAD;
+        } else {
+          mech.fireCDcycle = mech.cycle + Math.floor((mech.crouch ? 25 : 20) * b.modFireRate); // cool down
+          const SPREAD = mech.crouch ? 0.08 : 0.15
+          let dir = mech.angle - SPREAD * (b.modSuperBallNumber - 1) / 2;
+          for (let i = 0; i < b.modSuperBallNumber; i++) {
+            const me = bullet.length;
+            bullet[me] = Bodies.polygon(mech.pos.x + 30 * Math.cos(mech.angle), mech.pos.y + 30 * Math.sin(mech.angle), 12, 7 * b.modBulletSize, b.fireAttributes(dir, false));
+            World.add(engine.world, bullet[me]); //add bullet to world
+            Matter.Body.setVelocity(bullet[me], {
+              x: SPEED * Math.cos(dir),
+              y: SPEED * Math.sin(dir)
+            });
+            // Matter.Body.setDensity(bullet[me], 0.0001);
+            bullet[me].endCycle = game.cycle + Math.floor((300 + 60 * Math.random()) * b.isModBulletsLastLonger);
+            bullet[me].dmg = 0;
+            bullet[me].minDmgSpeed = 0;
+            bullet[me].restitution = 0.99;
+            bullet[me].friction = 0;
+            bullet[me].do = function () {
+              this.force.y += this.mass * 0.001;
+            };
+            dir += SPREAD;
+          }
         }
       }
     },
diff --git a/js/mobs.js b/js/mobs.js
index 0f55ef5..95cbf93 100644
--- a/js/mobs.js
+++ b/js/mobs.js
@@ -68,8 +68,8 @@ const mobs = {
             ctx.lineTo(who.vertices[j].x, who.vertices[j].y);
           }
           ctx.lineTo(who.vertices[0].x, who.vertices[0].y);
-          ctx.strokeStyle = "rgba(0,100,255,0.5)";
-          ctx.lineWidth = 30;
+          ctx.strokeStyle = "rgba(0,100,255,0.8)";
+          ctx.lineWidth = 15;
           ctx.stroke();
           ctx.fillStyle = who.fill
           ctx.fill();
@@ -1015,7 +1015,7 @@ const mobs = {
               b.spore(this) //spawn drone
             }
           }
-          if (b.isModExplodeMob) b.explosion(this.position, Math.min(500, Math.sqrt(this.mass + 2) * 80))
+          if (b.isModExplodeMob) b.explosion(this.position, Math.min(450, Math.sqrt(this.mass + 3) * 80))
         }
 
       },
diff --git a/todo.txt b/todo.txt
index 26f15ae..c05952c 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,5 +1,12 @@
 ************** TODO - n-gon **************
 
+mod - super balls fire one ball at a time
+  ammo and fire rate is improved by the number of balls fired
+
+mod - robot that attack nearby mobs, and delivers a stun status effect
+  use laser bot code for the attack
+  large and 5 sided?
+
 consider using the "e" key for picking up blocks and just q for gun swaps
   good for: plasma torch, time dilation, negative mass
   bad for: basic, nano-scale, harmonic