Anytime I call someone on the river and without showing their hand they say "If you have the Ace, you're good". I motion to their cards to gently tell them to table their hand since I called their bet only to have said player sit there like a dumbass.
I then remind them verbally that I called their bet only to hear "I can't beat your Ace...".
OK, let me be more direct - SHOW YOUR DAMN HAND.