Here are some of those situations:
DM: You're carrying too much stuff, you better buy a mule for that.
P: I see, but I have many things already, how much does the mule weights?
Result: still hurts when I remember that.
DM: Okay, you enter the tavern, now what're you going to do?
P: I ask the bartender for a diet coke.
Result: Closed my book and left.