Bingo?

*hands Bingo to everyone in lab*

Lili: What is Bingo?
Me: It's a game, where you mark off when something happens
Lili: Uh huh ("this sounds dumb" tone)
Leslie: You try to get a row of 5 when 5 things happen. Usually there are just numbers and someone calls them out, and you mark out whatever number is on your card. Then when you have a row, you shout Bingo!
Me: Have you heard of this?
Lili: We don't have game like this in China.
Me: So the joke is that these things would happen a lot in seminar.
Lili: Ok.
Lili: (reading out loud) Speaker sucks up to host professor. That is always! Hahaha
Me: Yup
Lili: (reading out loud) Speaker wastes 5 minutes explaining outline! That is always!
Me: Right
Lili: This is funny.