There's a commercial where Jennifer Harman mucks two kings when an ace flops and her opponent gives off a glimmer of a tell. She did that just now in a hand where an ace flopped and she mucked her cowboys face up, leaving her with just 1,200 chips.
Her fold proved wise when she was able to double up a few hands later when she committed the last of her chips with and flopped a queen against an opponent holding pocket tens. She's now back up to 4,400.