Five players see a flop. Check to the button, who bets. Action is on the SB, who is fiddling with his chips. It's tough to tell if he's considering his action, or just lost in space. I give him a few moments, before asking him if he's aware the action is on him.
"I said 'check'!", he grumbled, annoyed. "I guess you didn't hear that."
"We all heard it," I assured him. "Then, three other players checked, then the button bet, then I announced the amount of his bet, and turned to you--I guess *you* didn't hear THAT!"