An LIM impulse shuttle that rockets you back and forth up a straight tower and a twisted 'holding' spike.
Photo: Feather Better · CC BY 4.0 · Wikimedia Commons
Steel VenomValleyfair · 185 ft · 68 mphIntamin impulse
PossessedDorney Park · 185 ft · 65 mphIntamin impulse
Superman the RideSix Flags New England · 208 ft · 77 mphAlso by Intamin
Expedition GeForceHoliday Park · 174 ft · 75 mphAlso by Intamin
Raging BullSix Flags Great America · 202 ft · 73 mphAlso at Six Flags Great AmericaThe Flash: Vertical VelocitySix Flags Discovery Kingdom · 150 ft · 70 mphIntamin impulse