When I bang me head, I get an instant rage on - absolute blind fury! When I was younger, whatever I had in my hand would usually get launched.
As an apprentice for the MOD, I was working in the sonar dome of a Type 42 Frigate doing up the gland nuts on a big junction box with a hefty adjustable spanner. I stood up and hit my head real hard on a steel ladder, and immediately threw the spanner as hard as I could - it bounced off every steel surface in sight and very luckily missed the fibreglass shell of the dome.
As soon as it left my hand I realised my mistake, and had visions of sinking the ship right there in No 2 basin in Chatham Dockyard! It was either the Phoebe or the Hermione - can't remember which!
I still do the same and swear and shout like fu....