Memory just popped into my head.

I was checking out of Travellers half way through my stay, headed to Treehouse.

Front desk girl tallied up the bill, I gave her my card, signed something and she went back to typing on the computer. So I'm standing there at the front desk, just gazing out the door and after like five mins, she says "you good?" to which I replied, "yeah, oh, are we done?" She replies, "yes" and smiles. I laugh and say "Oh, I thought you were still working on part of my bill. thanks!" and wander off.

There weren't even any subs involved. I guess I'm so used to everything being some strange drawn out process that I didn't notice when the transaction was actually complete when done efficiently. But then I waited another 20 mins for my driver to arrive.