Unless they make thermometers meaner in Dagestan that seems like a curious timeline for metallic mercury exposure.
It’s obviously a bad plan(and, correspondingly, deeply unethical to do to someone else); but the world is full to bursting of older childhood stories of playing with little mercury globules without any sort of immediately noticeable impact. Even the really alarming cases of methyl and dimethyl mercury, where absorption is chillingly fast, don’t tend to mention acute symptoms; just inexorable ones some time later.
Something more bioavailable? Objective of scaring the target succeeded to the point of imagined symptoms of metal poisoning?
