Jackass prankster Bam Margera has undergone an emergency hernia operation after injuring himself during a kayaking stunt in Oregon.
The TV joker attempted a daring 100-foot (30.48-metre) drop in a kayak with professional sportsman Steve Fisher on Thursday (31May12), but the fall did not go as planned.
Margera posted a photo of himself in a tandem kayak with Fisher on his Twitter.com page, and followed it up hours later with another shot of him in a hospital bed, alongside the caption, "Hernia operation after 100ft kayak drop".
Margera, who was still in hospital on Friday (01Jun12), is no stranger to doctors - he has been hospitalised numerous times following outrageous stunts.
He was hospitalised with broken bones last summer (11) after falling down a flight of stairs while "horsing around".