Complex sentence: There are eight cars, sitting four abreast with ratcheting harnesses, but the seats are elevated off of the floor to an extent where the riders' legs hang, making them seem floorless, even though they are actually not.
Split into simpler sentences: There are eight cars, sitting four abreast with ratcheting harnesses. The seats are elevated off of the floor to an extent where the riders' legs hang, making the cars seem floorless, even though they are actually not.