That contest sounded pretty cool.. More games should do that lol.
Getting a headshot with a Repair tool sounds pretty damn hard.
go behind someone crouching then do it?
Sounds a bit difficult, i mean the odds of you finding someone crouching, going behind them and them sitting through the whole thing is pretty hard! But thats probably the only way to do aside from boosting.
You'd be supprised in the 1st Bad Company i collected 3500 dogtags which you have to melee kill for and most were from behind. So the repair tool thing will be a piece of cake imo.