I've lanced various things, no big deal. The two worst were duct taping shut a cut on my hand that needed a couple of stitches. Simply too lazy to go to the hospital, I cleaned it with alcohol, gauzed it, and duct taped it shut till it scabbed over. Left a funky scar, but no one really notices cause it's sorta in a naturally lined/wrinkly part of the hand.
The second was a large mole on my back, sorta by the trap when I was a teenager. It kept annoying me when I wore a jersey or if a backpack strap would rub against it. So one day, late at night, I go to change the way I was sleeping, and I feel the pillow banging into this thing, and I go "enough is enough, it's coming off tonight". So at first, I figure go nip it off with a scissor, but I can't really get a good angle on it, and I didn't want to mess around with sharp scissors. Next I head to the tool box and get a pair of long reach lighter duty needle nose pliers, I do the whole flame and alcohol sterilization thing, and get ready, I figure a good grip, and a hard, fast pull, and I'm done. Well I do it, and it only tears half way, so I get a better grip, and pull with a twist, and the mole, the root system and a few sundry hairs come with it, and they're all stuck to the end of these pliers. The only thing I could do was look at it, and think "yuck, that's fucking gross, and it came out of you"

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Left me with a scar the size of a pinky nail more or less.