thats amazing.
EDIT: Try that it gives a good effect.
javascript:x=0;e=document.body;e.style.position="absolute";function rt(){e.style.top=100-(50*Math.acos(x*Math.PI/180))+"px";e.style.left=100+(50*Math.tan(x*Math.PI/180))+"px";x+=5};setInterval("rt()",50);void(0);