Pictures Manual wheelchair Powered wheelchair with rear-wheel-drive. Scooter Example of augmented feedback, using a mirror to view caster position relative to a gap in the floor. Spotter strap. Spotter strap with the large loop around the cross-brace of a folding wheelchair. Spotter strap attached to the camber tube of a rigid-frame wheelchair. Spotter correctly positioned behind a wheelchair. Spotter catching wheelchair after a rear tip. Spotter spotting the wheelie skill from in front of the wheelchair. Controller in normal operating position. Controller in moved-away position. Switch for turning the power on for a scooter. Powered wheelchair user using his thumb to switch the speed setting. Scooter user switching modes. Scooter user using dial to adjust speed setting. Lever allowing one of the motors of a powered wheelchair to be disengaged. Caregiver pushing a powered wheelchair with the motors disengaged. Lever allowing the motor of a scooter to be disengaged.