In great Czech movie "Obecna skola" (The elementary school, 1991) principal warns students over PA not to lick metal railings in winter and of course students t

In great Czech movie "Obecna skola" (The elementary school, 1991) principal warns students over PA not to lick metal railings in winter and of course students try it and get stuck. He complains about it to a new teacher who responds "Students are young, they want to try everything". Principal then asks "are you telling me, if I say - Don't drink sulphuric acid, it will burn your intestines - that they will drink it?" And the teacher says: "I don't know, but better not say anything over PA".