Firstly I want to point out that when I say a friend, I mean a friend, and it is not some coded way of saying "me".
Anyway, a friend from work accidentally added screen wash to the brake fluid intake on his car the other night.
After it filled up rather quickly he realised his mistake and tried to remove the screen wash using kitchen towel (don't ask me how - his words).
Anyway, everyone at work has already told him he's an idiot for not getting his brake fluid drained and replaced, but he's not listening.
So, what is the worst that can happen?