I'm talking a medieval catapult. Basically, I have a character who will sabotage a wooden catapult so that when it launches, the boulder will only launch a couple of yards into the air and crush some soldiers standing nearby. The character will do so with magic that burns part of the catapult. Any ideas how I should do it? What kind of catapult should I use insert and what parts would need to be sabotaged to precipitate what I've described above? All suggestions welcome. Thanks!