http://www.woai.com/news/local/story...1s2lTRndQ.cspx
First time I've ever heard of someone blacking out from a brain freeze.

The accident happened around 2:30 p.m. Friday in the 2800 block of General Hudnell. The driver said he was drinking a "Slurpee," when he got a 'brain freeze' and blacked out. His truck went over a curb and hit four vehicles in a parking lot at an office building on Port S.A. When he came to, his foot was still on the gas pedal.