HAHAHAHAHAHA 
I have one of these sitting right in front of me! I just finished deflating a whole load of the boogers.
This doesn’t relate to human injury, but I once saw a package of lime scale/rust stain remover for bathroom fixtures which warned against using it on porcelain, grout, fiberglass, and metal. 
i would have to say that the current thread has a bit more panache…and danner doesn’t have to go looking for it.
This was the funniest of all…
Jonsreds Chainsaw
Do not attempt to stop chain with hands.
Thanks for the laugh.
Just googled and found a site;
I work in an allergy/asthma clinic and one day we received a nasal spray, specially ordered from the pharmacy for a one time in-clinic use, that was mislabeled: “Apply to rectum…”
Susan - who is really getting some laughs out of these