Back ride?

So today at Hunkapi, I got asked to back ride with one of the kids. This particular group has 3 wheelchair bound kids that come with them. Backriding is when one of the volutneers or aids sits behind the child to support them because they can't stay up themselves. This was my first time doing it. But thank goodness, I got to ride Tuff, the smoothest walking horse ever! (: It all went well, but afterwards, my arms were extremely sore!
I can't wait to be able to do it again. (: