Fear Factor

Celebrities test their mettle; contestants surf atop a double decker bus.

Contestants retrieve a flag from the wing of a biplane at 4,000 feet.

Contestants saddle up for Western-style competitions, including bull riding and cow brain poker.

Contestants must jump between speeding boats and retrieve weights from a tank of rotting squid.

Contestants must traverse a cargo net underneath a helicopter and eat pig rectums.

Contestants climb down the side of a blimp and bob for chicken feet in a vat of wax worms.

Playboy Playmates edition; contestants walk a tightrope ten stories up.

Playboy Playmates walk a tightrope 10 stories up, eat strawberries from an insect-filled box and retrieve glow sticks from freezing water.

World Wrestling Entertainment stars; contestants climb a ladder into a moving helicopter, drink a custom shake and climb poles in the rain.

Contestants must traverse a narrow beam and place their heads in a rat-filled box.

"Suicide Bridge" hang time; pig uterus skeeball; cable plate walk.

A celebrity edition features Kevin Richardson, Stephen Baldwin, Alison Sweeney, Kelly Packard, Alan Thicke, Ali Landry.

Contestants swim through a cold underwater tunnel, eat an egg containing a duck embryo and ride a bike across a beam 120 feet in the air.

Contestants must ride in a helicopter as it flies 25 feet above a lake.

Joe Rogan challenges contestants to conquer their fear of public nudity.

Three sets of twins, two female and one male, face their ultimate and separate fears.

Contestants must jump between buildings and eat spaghetti made out of night crawlers.

Nine previous winners return to compete for a 100,000 dollar grand prize.