Had surgery while on nitrous oxide and have never been so nauseous as during recovery. No thanks!
In a bit of classic Navy culture:
During the last part of the recompression procedure aboard
USS Dixon, out of the chamber, I was turned over to a guy fresh from boot camp. He was told to interview me and fill out forms as makey-learny (Navy OJT.). I was told I could expect to be billed a few hundred dollars for what was actually several thousand in services.
I was never billed and I think I know why. When the kid came to a box on the form he wasn't sure of, he turned and asked "Hey Chief, what do I put for autopsy results?" The chief who had supervised my chamber run was in full flow spinning tales with a chief from the machine shop and didn't hear. I answered "pending." Relieved at having an answer without having to interrupt the chief, the kid wrote "pending." I haven't been billed because the autopsy results aren't in yet.