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."
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."