Not only have you just fucked up verbally, but you've also reminded your waiter that they're not going to be eating; you are. They might be very hungry. But they've gotta keep working while your face gets greasier and greasier. Nice going, pal!
You signal for the car to go, but they signal for you to go and then YOU BOTH START TO GO. And then you both stop. It's the worst because either you're dead or the driver's killed someone. Stakes are high. Triple points for discomfort if you're in your neighborhood so you and the driver of the car most likely know each other.
Now you have to explain why your hands are wet and assure the other person that "you JUST washed your hands" while they sort of retract and think that you peed on your hands or something.
What do you do when you see the cast of Full House's kids? Do you brag about it later? No, because then you have to explain that you watch all of their make-up tutorials on YouTube and that's another reason for people to feel sad for you. (But also it's so cool seeing ANY celebrity that you need to tell someone.)
Hopefully it's your mom's friend! The one who talks an awful lot about your mom's other friends. The one your mom "likes but can be a bit much with the gossip." And hopefully you're with your significant other when this happens! ;)