When I was in highschool some kid stole a huge chunk of potassium from the chem lab and blew a bunch of the water out of a local pond.
More likely metallic sodium. Ive done that trick. Its pretty spectacular.
L
A bunch of parents on the schoolboard got pissed.
Not about the pond or the explosion or that a kid could have gotten hurt of course, but over the cost of what was stolen from the lab.