On the kitchen sink: view_animation.js
change these line:
var a1 = Titanium.UI.createAnimation();
a1.left = 10;
a1.bottom = 120;
a1.duration = 800;

var a2 = Titanium.UI.createAnimation();
a2.right = 10;
a2.bottom = 80;
a2.duration = 800;

Adding the left and right as well as the up and down.
So it should slide diagonally. It does it the first time then goes back to just up and down. I was trying to slide something right on my app and it wasn't working right so I tested it out on the kitchen sink and had the same results.