Yep, I watched a forklift detonate once after an accident left it in the middle of a burning pile of pallets. They got us all WAY back, but the blast was still pretty impressive when that baby went up...and we were OUTSIDE. I can't imagine how powerful that blast must have been in a confined indoor space.
Propane/LNG explosions are nothing to laugh at.
Something to think about if cars powered by hydrogen gas are common on the highway.