Hidden localstorage option to enable bouncy read receipts :p

src/VelocityBounce.js

@@ -0,0 +1,15 @@
+var Velocity = require('velocity-animate');
+
+// courtesy of https://github.com/julianshapiro/velocity/issues/283
+// We only use easeOutBounce (easeInBounce is just sort of nonsensical)
+function bounce( p ) {
+    var pow2,
+        bounce = 4;
+
+    while ( p < ( ( pow2 = Math.pow( 2, --bounce ) ) - 1 ) / 11 ) {}
+    return 1 / Math.pow( 4, 3 - bounce ) - 7.5625 * Math.pow( ( pow2 * 3 - 2 ) / 22 - p, 2 );
+}
+
+Velocity.Easings.easeOutBounce = function(p) {
+    return 1 - bounce(1 - p);
+}