I was bored one day then friend of mine sent me a link to a document from Typewith.me
Basically all that this is is a live collaborative text editor .
At first we tried to work on a makeshift essay then….. we ended up messing with each others heads by editing what we were talking about.
See for yourself
Try to see what kind of random things you can do with this (p.s. I was the one typing in pink)