A Missouri woman is dead after injuring herself while trying to do somersaults on an inflatable slide during her stepson's birthday party.

Ambulance district official Curt Steve says the family was celebrating the boy's 8th birthday Sunday. They were at a party outlet south of St. Louis when Sheri Stevens was hurt.

The 28-year-old Stevens may have broken her neck. Ambulance workers found her unresponsive at the bottom of a slide.

Family members had no comment.