I found this one years ago when I managed a truck stop. Heck, I was LOOKING for it!
We were getting fresh packs of twenties from the bank. I was only HOPING we would get the pack with this one it.

Although I am primarily a coin collector and always have been running a truck stop made me look into currency.
For anyone that handles paper money I sincerely suggest that you learn a bit about it. Not easy to spot like wheat cents, silver etc. BUT there are a lot of variables to choose from even in the MOST modern notes.
Knowing what to look for can be a great asset.