This is my night, edited to remove the sheer amount of shaking I was doing:
Robber(wearing underwear on his face for a disguise): I'm sorry, but I'm going to need all the money in the register
Robber: All the money please
Me: ok (gives money), sorry about all the change
Robber: it's fine. Sorry about this, man.
Me: Hey, hard times right? Have a good night
...that ******* happened