An old man is driving along the road humming to himself.
Suddenly he hears a police siren and a motorcycle cop pulls him over.
He can't imagine what could be wrong.
"Sir, do you realize that you left your wife behind in the gas station?"
"I did? I am so relieved."
"You're relieved you drove off without your wife?"
The gent nods.
"But didn't you sense something was wrong?"
"Yes, I thought I'd gone deaf."