A rider who doesn't take his turn is "sitting on the break".

The rider sat very still, then he removed his hat.

The riders sat on a circular couch within the car.

In both cases, the rider remains off the saddle and does not sit or post.

In this design, the two riders sat back to back.

This had two wheels the same size so that the rider could sit at a lower height.

This is where the riders sit during the ride.

A rider sat stiffly on its back, tiny compared to his charge.

The riders sit upon a horse shaped vehicle which can seat one or two people in line.

Riders sit in one person tubes as the gentle current pulls them along the course.