One of the chemistry teahcers at my school taught me some pretty crude jokes on the German trip... His name was
Mr. Crowley, incidentally.
He also walked into people's lessons at random and lighted strips magnesium he carried around... And he also did a lot of the cooler explosive experiments for no reason, too... He was everyone's favourite teacher... Now he works at Trent University, I believe.
...
...It turned out Wally wasn't behind me... He must've slipped away when I was turning around... He's a crafty one that Wally.