Factual error: It is not possible to be "allergic to all known anaesthetics". Amongst the amide local anesthetics lidocaine, prilocaine, bupivicaine, mepivacaine and dibucaine are naturally occurring substances and if administered without a preservative they cannot trigger an allergic reaction. If Bales is allergic to them, he'd be allergic to the metabolic processes of his own body. They are all powerful local anaesthetics and could easily be used for a radical rhinoplasty such as that required by Bales.
Factual error: When they are putting out the fire, Charlie belts out "I want two 2-1/2 inch lines from the pump to the fire and three 1-1/2 inch lines from the hydrant to the pump". This is backwards. No fire department would ever use three small handlines to supply an engine from a hydrant.
Charlie: Ten more seconds and I'm leaving! Ten-
Roxanne: What did you say?
Charlie: I said ten more seconds and I'm leaving.
Charlie: What did you think I said?
Roxanne: I thought you said earn more sessions by sleeving.
Charlie: What does that mean?
Roxanne: I don't know. That's why I asked.