I agree. There's a button that seems to activate whenever I stub my toe - it spews all the swear words I know (that's quite a lot) out, all at once.
I was wound up so badly by a person at my factory job in the early 80s that I considered abandoning my pacifist principles and attacking him. Given that I did not think that would be very civilised, and also his reputation for extreme violence, I decided that it would be better to attack an inanimate object instead so I kicked a large pallet across the factory floor. The act of doing so rammed my big toe up the inside of the steel toecap of my safety boot. I ended up with a cracked toe which turned black and blue, and a couple of days later, the nail fell off. It stung just a little bit ...
Oh, and I accused my colleague of being a complete rotter and told him that his parents had forgotten to get married.