diff --git a/examples/newtonsCradle.js b/examples/newtonsCradle.js
index 7aaf66a..049cecf 100644
--- a/examples/newtonsCradle.js
+++ b/examples/newtonsCradle.js
@@ -99,7 +99,7 @@ Example.newtonsCradle.newtonsCradle = function(xx, yy, number, size, length) {
     for (var i = 0; i < number; i++) {
         var separation = 1.9,
             circle = Bodies.circle(xx + i * (size * separation), yy + length, size, 
-                { inertia: Infinity, restitution: 1, friction: 0, frictionAir: 0.0001, slop: 1 }),
+                { inertia: Infinity, restitution: 1, friction: 0, frictionAir: 0, slop: size * 0.02 }),
             constraint = Constraint.create({ pointA: { x: xx + i * (size * separation), y: yy }, bodyB: circle });
 
         Composite.addBody(newtonsCradle, circle);