What do you do when...

...you are in a store and your baby barfs on the floor? We had no bag with us, so no wipes or blankets or anything like that. I just had the two kids and my wallet, because it was a just a 1/2 block trip to go get 1 thing. So I'm looking at the spit up, looking around. It was too big to leave it there, but I had no idea how to communicate my need for paper towel to the store keeper. So, since it was close to bath time and all, I just sat him down on it and wiped it up with the butt of his pants. Is that so gross?