Nobody Saw, Right?
Whenever you’re out in public, whether you’re biking down a park or eating at a restaurant, always assume that people are watching. You might be a disgusting wildebeest at home, but if you can behave somewhat normal in public, nobody will bat an eye at you.
So, if you drop a slice of pizza on the floor, don’t bother awkwardly looking around for people that noticed you. It’s safer to assume that either someone saw you or that you’re on CCTV. Just take that slice of pizza and toss it in the trash can. Don’t put it back onto the pizza tray with all the hair and lint it picked up from the floor!