Dune bashing vehicles are purpose-modified 4x4s, typically with reduced tire pressure for better sand grip, roll cages, and reinforced suspension, not standard rental cars taken off-road.
Drivers are trained specifically for dune terrain, reading slopes and sand conditions that look identical to an untrained eye but behave very differently underneath the vehicle.
Seatbelts stay on throughout, and vehicles typically travel in a loose convoy rather than isolated, so help is never far if something does go wrong.
Pregnant guests, anyone with recent back or neck injuries, and those prone to motion sickness should mention this at booking, gentler routes or alternative activities can usually be arranged.
First-timers who are nervous can ask to sit in the front seat, which some find less disorienting than the back, and can request a gentler pace, most drivers are happy to adjust once asked.