This topic reminds me of what happend to an old Frat brother in college. He was a big guy. He took his date out in his VW bug one night, parked and got in the back seat (~!) and the weight of the two of them caused the battery posts to make intermittent contact with the rusty steel in the seat bottom, and the seat stuffing caught fire. This was embarrassing to say the least, he had to yank the seat out and leave it smoldering somewhere, then take her back to the dorm smelling like what I would imagine to be burnt rubberized horsehair. tsk tsk!

FWIW, I installed my battery in the trunk of the 220. I needed room under the hood for electronic ignition stuff. Wanna see a pic?
Dieseldiehard