An obese virgin nearly killed his girlfriend when his weighty and enthusiastic thrusts during his first attempt smashed her head through a wall.
Two-hundred kg, Gregg Casarona, thought he had killed 50 kg Jen Gerakaris - luckily she just suffered a concussion, reports the New York Post.
He said: "My initial reaction was, ‘I killed her. This is my first time. And Jen is dead."
The scene was reenacted for a new TV show
Despite the knock, Gerakaris saw the funny side and said "why did you stop?" as she was freed.
She said: "I wanted to lighten the mood".
The incident happened in Long Island, New York eight years ago but the story has come to light in a new series, documenting weird sexual accidents.
Chicago doctor Jordan Moskoff told ABC News that he deals with sex-related injuries in the ER about twice a week.
"[Penile] rings are really problems," he told the network. "That should be a public service announcement: Don't use anything that doesn't have a hinge or is not made of rubber, or it's not coming off."
He noted that objects stuck in a patients' rectums is one of the most common accidents he sees, but people frequently lie and tell him they "fell on something."