A human cannonball dressed as Captain America was left unconscious after his circus stunt went terribly wrong in front of hundreds of shocked spectators.
The masked acrobat missed the safety net and smashed into a metal rail at Uncle Sam’s American Circus in Llanbradach near Caerphilly, South Wales.
Stunned spectators watched on as paramedics rushed to the aid of the daredevil, who suffered "life-changing injuries" as a result of the incident.
