ended up costing me over £400 - so about $650. i've given everyone a bit extra as idiot tax, and they've been pretty cool about it, considering. it wouldn't of been too bad if it was just the blades, but i ripped the entire arms off (including the arm motor mechanism on one car), plus one of the cars was a nissan skyline. i can't even remember doing it, save for a brief, blurred frame of memory of throwing a wiper into the snow.
had to get an instant loan with a ridiculous amount of interest to cover the costs, but at least the police weren't involved and i can get on with christmas. from now on, i'm going to have to make sure that my friends keep an eye on me when drinking, and give them full permision to beat the living shit out of me if ever attempt anything so idiotic again.