What Dad Does

It's a long walk from the junior school classrooms to my teaching room.  On the way, I was talking with a grade 3 girl, and she mentioned her dad having to work on Saturday.

Me: What does your dad do?
Girl: Well, when people are about to go into surgery, he knocks them out by hitting them on the head with a hammer.  And when they're done, he wakes them up with a coffee.
Me: So ... he's an anaesthetist?
Girl: Yeah... but I prefer saying he knocks them out with a hammer!