Wake-up call

Nancy My dad was taken to the hospital last night.
Annie Is he all right ?
Nancy He is fine now, but he thought he was having a heart attack.
Annie Did he ?
Nancy No, he ate 30 of my Mom's dumplings. He just had heartburn.
Annie Not so bad.
Nancy Yeah. It was a real wake-up call for him, and now he's going to eat more carefully.