I've just started using GNOME for my main desktop environment and I was answering the phone and when I came back to my computer the windows all flew around the screen like I was on some kinda freakin mac. That was pretty cool, but I don't know what I did to make it happen. I think all I did was move the mouse. Any ideas?
You probably accidentally hit a compiz keyboard shortcut. There is a list here if you want to try and replicate it.
I think one of these are what you're talking about: