Not really news to anyone but this is especially true AT HOME. Whatever size extinguisher you think you need, double it, and then buy 2 of them.
Quote from article:
"During an attempt to start, the engine backfired through the intake, blowing the intake off of the runners, and setting the fuel hoses on fire. By the time I had caught my dog, who had been sleeping in the garage, the entire engine bay was ablaze. By the time I had dialed 911, the garage door was on fire. The garage burned down, taking my 84 GTI, and my brother’s Audi 200 TQ Avant and Alfa 164Q with it."
Sad read: http://oppositelock.jalopnik.com/my-alfa-is-gone-1700196295/+matthardigree
That is awful. At least he had a detached garage, so it didn't take the whole house down.