Recently, while I was on an outing in town, I saw someone reclining in a wheelchair. It took me a moment to realize that was odd, since to my knowledge wheelchairs aren't supposed to lean that way, so I looked a little closer, and I realized their wheelchair had an extra pair of wheels, really tiny ones that were raised a bit off the ground, for the express purpose of leaning back on and reclining. And I thought that was pretty cool.