The Double Swinging Inverter is a downloadable Thrill Ride created by Dan Wolfe/The Amazing Earl. Cars swing in opposite directions, turning the riders completely upside down. The capacity of the ride is up to 16 riders. The ride was later used in RollerCoaster Tycoon 3.
In Real Life
The Double Swinging Inverter is modeled after the infamous Inverter ride, but unlike the original ride, the Double Swinging Inverter contains two Inverter rides in one, as the name suggests.
However, a real life version of this ride is known to exist at Six Flags Holland/Walibi Holland.