I have never encountered this, but my first attempt to score the coin(s) I wanted would be to ask politely if they would do it.
I asked once and they said no.
So you could see a silver dime or quarter in there? That would drive me nuts, especially if it's a quarter.
Sweet observation 50, this never crossed my mind.
It was a quarter, certainly did not look Canadian.
Could they not give you change until you got it?
I woulda been ticked.