Watch Know Limits: Extreme Sport Highlights (1992) : Full Movie Online Free Get your heart racing and your adrenaline flowing with this action-packed extreme sports program, which features jaw-dropping scenes of mountain climbing without ropes, surfing in shark-infested waters, skiers flying off of cliffs, and much more. With insane footage from a wide variety of outdoor sports, this program also highlights hang-gliding adventures and thrilling downhill mountain-biking competitions.