[Plop]

I saw guy walking around with a drink today. A few seconds later I heard a [plop].

I turned back to the (now empty-handed) guy. He looked at me and sheepishly said, "I guess that's why you don't allow drinks in here." I gave him a stony look. He asked me for paper towels. I handed them to him and he cleaned up the mess.

Afterwards I felt a little guilty because I wasn't particularly nice to him. It was obvious he felt bad about spilling the drink. I could have laughed it off and told him, "It's ok, accidents happen." But I didn't.

A while later I realized that he must have seen our "No Food or Drinks" sign on the door. That means he approached our front door with a coffee in his hand, saw the sign, decided to ignore it, walked in the store, and spilled his drink.

I stopped feeling guilty.