I happen to have the privilege of being a member of one of the most fun cosplay groups that I know of. Kakumei Media (formerly known as Viko Arts) loves having fun with their cosplay as the next person. So much so that when cons aren't going on, they're always trying to find new things to do for a good laugh.
For example, this is their latest foray into seeing just how far they can push things: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5979453024
Yeah. All they wanted to do was see what would happen XD
I love my cosplay group <3