This was a while ago, but I'll post it anyway.
I waited for the person in front of me to finish using the coin machine, and when they walked off, I looked in the reject tray. This is what I found:
1979 Italian Lire- uncirculated! (pre-Euro)
Belgian 5 Franc (pre-Euro)
6 or 7 euro cents (ranging from one cent to five cents)
Costa Rica- 10 cent
An Egyptian coin
2 50 pence British and about 5 1 penny pieces
A Mexican dollar
1 Canadian cent, 2 nickels, 3-4 dimes, 3 quarters, and a 2 dollar coin
Quite a few regular USA pennies, dimes and quarters
I had to stick my hand waaaay up the machine to get all that out!