[quote=Joegreenbeen]
What kinds of things do they do?
[/quote]

Climb the walls of the screen, cling to the ceiling, fall from the ceiling... plus a variety of other animations that vary between characters.

Also if your browser window isn't full-screened like mine is right now, they have a tendency to grab it and throw it offscreen where you can't retrieve it anymore. You can right-click them and make them bring it back but other than that there's no way to really retrieve it. Clicking it on the taskbar doesn't even do anything. O_O

In fact once I had a bunch on my screen, and I was messing around with them, and then I deleted them all, but forgot that they tossed Chrome out into no-where land. I couldn't get it back after that and wound up just having to close out of it and re-open it again. @_@

It's kind of nuts to watch. But obviously this isn't something I do every night.

(Also I saw at least three new ones spawn while I typed this- no make that four. I should probably delete some of them now.)