The Rum Punch.
You sit there with a glass of Rum, drink it, then have one of your buddy's punch you hard in the face. Also funnier to do when you are drunk.
Extreme Pub crawl.
Go from one bar to the next, whilst wearing roller skates, the more drunk you get and the more uphill climbs you need to do to get to the next bar, could be very funny.
More to come....
P.s check out my own little jackass episode i made, called kettering dumbass. its on youtube