El Indie.

So this story begins at the beginning of my donut serving career.
This man strolls in like..wel like he's coming to order a coffee.
He does, order I mean, and pays with a 20.
"So, 17.43$ is your change..." I said, with a smile of course.
He looks at the ten and the five with dawning confusion.
"No, I payed with a ten." He takes the ten and gives it back to me.

What to do?

a) Agree with the crazy man and take the ten
b)Be paranoid and think he's testing you
c)Out of honesty, give him back the damn ten

I decided to go with c)...even if I was a bit of b) also..

"No, you payed me with a 20!" I almost yelled at his face
This back and forth had been going on for quite some time.
"HERE take the ten, it's yours!" I pushed the ten at him. He took it and sat down.

Then, he started talking to himself..or to the whole restaurant,
whichever you prefer really.

He came back later on, pulled the same BS about the 20 and his stupid change. It didn't take quite as long to push the ten towards him and move on with my "work".

Not too long after this second "argument" he came back, but I was sitting down this time.
I shall sum up his words
"How much is a can? No? It's ok, don't get up," (I hadn't moved)"No, please it's ok, never mind, no, no, it's ok! No can!" Then he walked out.
Viva El Indie!