I read here about a three-liter bowl of mercury... The author, you are ignorant. The bank breaks out of a large amount of mercury, because its weight is disproportionately greater than water - this is once. Mercury does not eat anything: neither the shoes, nor the wreath, nor even the skin. If this happened in the institute, it would be closed until complete demercurization. Everyone else is just as stupid.
PS: The winter holidays in schools have begun, immediately replaced.