What’s the worst sub you’ve had at your school?

Love my subs but I’ve seen some real stinkers, including this past week. What’s the worst sub you’ve seen either in another class or in your class?

Last week we had a two day sub for a class and I’m not joking when I say she left the class alone to go use the restroom. Didn’t tell the other teachers or anything. Pretty sure she was hitting the weed vape or something lol.

Edit: I meant she left the class alone EVERY PERIOD ON BOTH DAYS