The moment where someone is talking and you're not paying attention, but trying to be a good person, you nod your head and then say "wait, huh?", making the person re-tell the boring story no one wanted to hear in the first place.
Teacher: *clearly sees student texting*
Teacher: "So Steven, then the square root of 16 is 5 then?
Teacher: "Oh really?"
Steven: "Wait, huh?"
Phillip: "Oh man, Steven just had a real bad huh moment"
Kyle: For real, dude.