I'm gonna have to go with the 0.01% option. Hey, it happens to all of us. We just aren't normally luicky enough to get a second chance. :-) good for you.
By any chance does your dump machine reject silver a la CoinStar or did you just get extremely lucky? I can't believe this coin was stuck in the machine from the prior user. I'd play the lottery tonight if I were you.
I find it more unlikely that you could have missed it. I dump at 7 branches of two credit unions. Only three of the machines, all from the same credit union, are the same model. When starting to dump, I sometimes hear a coin either drop off the belt, or spin around before I have added a single coin. Sometimes those items are screws or even .22 cal shells, earring, etc. Because I don't want to bring a slip to the teller for an oddball amount, like 300.11, I carry a plastic bag with loose change to round up my total to either the next $1 or so to make a nice even amount. When learning the characteristics of these different machines, I found that some of them are more prone to the odd coin. But when dumping halves, I know that any rejected or accepted cents, nickels, dimes or quarters are from a previous user.
Right. I guess I’m just confused because I rim check and sound check everything, so i ‘check twice’. You can absolutely tell the difference in sound when there is a silver coin in a roll versus all clad.