Random fun games to play on msn messenger 7.0

I am trying to think of some fun games you could play with your mates on msn messenger using only what services come with the appliance(no add onns).

So far i have a pretty good one, its called nudge nudge.
You click the nudge buttons and see how many times you can get the “you cannot send a nudge this soon” message to come up between the time of your first nudge and second nudge. basically you just keep clicking the nudge button untill it allows you to do a second nudge and then count up.
pretty neat huh?

anyone think of anything else?