Gopher?

In 1995, a boy at Carroll Fowler Elementary School in California caught a gopher on the playground. Not sure what to do with it, he brought it to the school's three janitors. They decided to kill it. They sprayed the gopher with three cans of freezing cleaner they used to remove dried gum with. The gopher was still fine. While the men decide what to do next, one of them lit a cigarette. The freezing solvent they had been spraying was flammable! The explosion that occurred next sent all three men to the hospital, and hurt over a dozen children. (Most of them were just running away from the explosion and tripped.)