The blade kept slipping off my bandsaw, so I was Clever and gave my very cheap tyre a bit of a crown using a Stanley knife (box cutter).
Hey, so, did you know: a knife, jammed into a full-speed aluminium bandsaw wheel, will cut halfway through, immediately stop, bend, and ruin the wheel? The knife will also be destroyed. The sound will be tremendous.
If you're lucky like I was, you won’t get hurt — sadly, you probably won’t re-learn your Lesson about not doing Stupid Shit late at night.