A Kansas couple shared unusual ultrasound footage of their unborn son punching himself in the face while in the womb.

Vanessa and Dave Watson said they were at the doctor's office Feb. 8 when they watched the 5-1/2-month fetus, Edward James "EJ" Watson, hitting himself in the face so hard that he was knocked backward.

"I wanted to ask him, 'Why are you knocking yourself, boy?'" Vanessa Watson told the Wichita Eagle. "The nurse doing the ultrasound said that in 20 years she's never seen anything like that."

The couple said they were initially worried EJ may have given himself a concussion, but the nurse put their fears to rest.

Vanessa Watson said the humorous incident has led them to consider what EJ's personality will be like.

"We love ultimate fighting. So we were just talking about that, maybe he's going to be some fighter or some boxing guy," she told KAKE-TV.