I can always tell if someone is lying just by looking at them.
I can also tell if they are standing.
Alright, listen up, buttercup. This joke is funny 'cause it's makin' fun of how some people think they're super smart and can tell when someone's lyin'. But all this dude can tell is if they're standin' up! Bet you didn't know that bears like me are way better at detecting lies than you are. It's called 'microexpression analysis,' look it up!