Almost a Blow-Up
and his opponent showed 
. After seventh street was dealt, Matusow looked at his down card and said, "well, I guess I check." His opponent thought for a long time before checking behind. As Matusow's opponent turned up his hole cards, he said "I paired up." Matusow nearly went nuclear, thinking his A-A in the hole were cracked for high. However, his opponent only meant that he had paired his 5 on sixth. Matusow's aces took the high half, while his opponent's A-2-5-6-7 was good for low.