Last year one of my housemates 'blocked the toilet', I tried to fix this by chopping some hosepipe in half to shove down a clear the constriction. I decided to use the same knife that Navy Seals use (a bored Ebay purchae). Due to the insane sharpness of the knife it slipped and severed 1.75 of the two tendons connecting the thumb to the rest of the hand, along with a bunch of nerves and some muscles.
The monster gash in my hand didn't bleed at all and also didn't hurt, though it was somewhat alarming to actually see severed musles inside your hand. Got it all reconnected (I thought severed tendons were unfixable previously), though the hand is slaightly gimpy in terms of grip strength.
FREE modern surgery is sweet.
And so are hospitals in general.
Molina