oooooppppsie !

there are also many others such as-
- walk round town blowing bubble nd saying 'buuuuubblleesss ' in ur most childish voice as u walk past'
- make sure they see that and then get 'them' to reenact that moment to all their friends
- also you have to do a stupid walk that looks like ur humping the air as u walk and get them to watch as you walk round with your mates
-you have also gotta try getting really hyped up nd start spinning ur arms nd say ' and round nd round nd round ...etc ' for ages then turn round and see 'them' standing there.
- also try head banging to a crappy song while walking past the sports hall then realize that 'they' are having an exam in there and can see everything.
- while walking past get ur friend to push u towards the doors of the sportshall so u scream and drop your ear phones and have to go back to the door with everyone watching and pick up your ear phone.