In case you missed it, a ride at Playland's Castaway Cove malfunctioned, leaving riders hanging upside down for an estimated five to seven minutes. But watching it immediately made me wonder: How long can a person actually be upside down before it becomes dangerous? Your risk depends on things like your overall health, the angle of inversion and how you're secured in the ride. Once they're upright again, riders could experience dizziness, lightheadedness, headache, nausea, blurred vision or weakness, particularly while their circulation readjusts. Ride or Regret: 12 Wildwood Attractions You Need To Ride This Summer Summer is NEVER complete without a ride on some of your boardwalk favorites.