i have what i think is an insect bite on my arm which is annoying me no end. to try and numb the pain of the insect bite, i pressed my mug of boiling hot coffee against it for about a minute. and it worked, except now i think my arm is slightly burned and is throbbing and looking kind of red. and it's more pain than i started with. i feel like a moron.

what's the dumbest way you've caused yourself minor pain?