i once rammed a broken off glass pasteur pipette under my left thumbnail about 2-3cm deep while working in a tissue culture hood. most of the glass shards remained in my finger so i had to get surgery. two fucking times! after the second surgery they still couldn't remove all the shards (which actually grew out along with my thumbnail in the next months!). good luck for me the pipette was sterilized for working in the tissue culture hood.
i think that's definitely the most stupid and painful injury i've afflicted to myself
i think that's definitely the most stupid and painful injury i've afflicted to myself