I went to a one room school with grades 1-8, around 30 kids. When we were about grade 6 or so, we studied pressure vessels. A fellow student decided to experiment with a pressure vessel filed with water in the barrel stove. He took one of those old swoop sided vanilla bottles, nice thick glass, as his pressure vessel. The barrel wood stove was made from a barrel laid on its side with legs added plus a heavy cast iron door end. Everyone in the school knew what was coming except the teacher. It blew and the cast iron door end ended up in chunks. The fellow who did it got strapped. The good old days.