What happened to my garbage disposal?
a shot glass that fell into it while running


It's pretty obvious the glass shattered and chunks were flung against the wall. Note how there's a line where the hole is. Since the bottom of shot glasses is thicker than a normal glass, it probably got enough velocity to puncture the wall (and you're lucky that's all it did)


  I'd like to know what happened here to hopefully prevent it in the future


Don't put shot glasses down the disposal. ;)