Heber City, UT – 400 pounds of snowmobile slam down on Steve Medrano's head as he attempts a dangerous backflip. Zephyrhills, FL – Skydiver David "TK" Hayes tumbles across a pond when he comes in too fast. Brands Hatch Circuit, West Kingsdown, England – Chris Martin takes a nasty wipeout during a motorcycle race, crashing into the safety barrier. Memphis, TN 1979 – Multiple barrels of parathion insecticide explode, spewing a cloud of toxic gas that threatens the city. Wiltshire, England – Rival racers Peter Chambers and Godfrey Jones crash into a dirt barrier. Tri-Cities, WA – The 2006 Hydroplane Atomic cup. Dave Villwock drives a Miss Elam Plus speedboat that flips and slams into the water. Broadbottom, England 2005 – Comp safari racing with the Northern Off Road Club (NORC). An orange land off-road rover, driven by Dave Brown and his navigator, tries a jump, catches too much air. La Paz, Bolivia – 2 weeks of heavy rain erodes a hillside, and causes multiple houses to collapse.