I would finally have someone who is as obsessed with parkour as I am, or he is or... whatever, the thing i love most besides staring at my home room teacher's boobs every morning, is foot races through my school with paths that necessitate the use of parkour, so i can freak people out when i jump out of a turn, wall run on the adjacent wall, kick off and continue running at full speed, having a clone would enable me to do that until i passed out from exhaustion, and I'd have some one to hold my friend while i sack-whack him, man that's funny.
plus that poor prick is gona do all my assignments and homework, work slave, mwuhahahaha