Mercury exposure like that (as a liquid) is harmless.
The vapors when heated aren’t.
My father told me about playing with it as a boy. The silver dime amalgamate trick.
I’ve kept mercury for years, a fascinating metal.
Spills aren’t fun or easy to completely clean up and must be avoided…ha-ha.
Been to the Mariscal Mine in Texas and another one nearby. Unfortunately the distillery for the Mariscal mine was completely torn apart. Huge section of 30" diameter terracotta pipes laid strewn about, most of the hearth remains. It’s eerie to walk those grounds because you know at least some if not all of the workers suffered from their exposure.
Even mining it is hazardous. Cinnabar was all around both sites, cool. Both mines are still there too, now a haven for bats.