It is rude to be disruptive when people are eating.
Kyle who is a waiter is watching over his customers Pam and Sam who are eating their meal.
Kyle wants to make sure Pam and Sam's meal is OK so far.
Kyle walks into the field of view of Pam and Sam and does a thumbs up gesture while raising his eyebrows.
Kyle walks up to Pam and Sam's table and asks them while they're chewing if everything is good.
Both Pam and Sam return the gesture to let him know they're good and appreciate that he didn't make them speak.
Both Pam and Sam are annoyed as they feel rushed to chew through their current bite to answer Kyle's question.