A woman books an appointment with her dentist after noticing that one of her teeth hurts every time she eats.

When she arrives, the dentist asks her to sit in the chair so he can investigate what’s happening.

The woman sits down, and the dentist asks her to open her mouth.

“Open wider,” he says.

The woman opens her mouth as wide as she can.

“Dear God,” the dentist screams. “You’ve got the biggest cavity I’ve ever seen. You’ve got the biggest cavity I’ve ever seen.”

The woman blushes.

“Okay, Doc,” she says, “I’m scared enough without you saying something like that twice.”

“I didn’t,” the dentist replies. “That was the echo.”