I had a Sears Diehard explode in a 1962 Plymouth Fury I use to own, it ruptured the top and spewed acid all over the left side of the engine compartment and on the bottom of the hood, some leaked out onto the front fender also
I had stopped for gas and the original alternator regulator was malfunctioning over charging the battery at 30 amps for over a hour. I shut the car off and when I went to restart it, it had flooded some from the heat under the hood, it was in the Mojave desert in mid May and once the motor started to catch it backfire through the carb and the air cleaner inlet tube (it was a later air cleaner for a 1969 C body) was directly over the battery and the fumes form the over charged battery went BOOM
I hate Murphy