I have a few suggestions....
How about being able to SIGNAL HORSE TO FOLLOW (other person on horse) It's hard to run around with friends when everyone is on a horse.
And then you can TIE JOEBOBDEADER TO SADDLE ON HORSE, would be interesting to see someone getting dragged behing the horse on a nice long rope. (would get some extra wounds sliding along the ground though)
But for the stronger peoples TIE JOEBOBDEADER ON HORSE, Why not pick up joebobdeader and throw him on the horse, tying his arm to his leg around the horses neck to make sure he doesn't fall off.
Of course the all the options would have to be trained to the horse. And for all those thieves out there, maybe SIGNAL HORSE TO NUZZLE SUE. Sounds odd, I know, but maybe a few seconds to make Sue turn her head to pick of a coin or two. *wink wink*
Well, ok maybe not the last one, but I gotta have fun.
-Player of