I had a "coin related nightmare" last night.
It all started off very well. My sister

found a 2000 $1/10c mule in her change



.
Upon closer observation I noted that it was not that well centred, but still a very good coin.
Being a helpful brother I offered to "clean it up" for her using some very good beer swill


Upon dumping the coin into the swill, it started to turn black

and bubbles were seen to be generated from the surface of the coin



I woke up in a cold sweat ....
Squire