you know, when you grab a bottle or a tube of something and it's not what you wanted.
this morning i sleepily went to apply benzocaine to my mouth ulcer, and it started turning white and very dry. after a few minutes i suddenly realised i'd applied 40% salicylic acid to my mouth and i began swirling and drinking thick baking soda milkshakes. my mouth is now a fucking wreck. good news is, my ulcer doesn't hurt anymore because i burned it clean off.
little while back i also grabbed ointment and put it on my toothbrush. fortunately the smell got to me before i had to find out via taste.