You said; ( I have not witnessed a horse
volunteering to jump for the fun of it.)
I don't think you followed these threads right.
Don't feel bad I've been pretty confused reading Ridecamp for the last week or
so. No one said a horse will jump just for the fun of it. I think
they said that some horses will jump because their feet get hot from standing on
hot pavement. Then Truman said that one of his horses got hot feet and jumped on
a girl at the BH race and broke it's neck. Then Diane got upset with Truman for
letting his horses feet get so hot. The sad part is the horse would be fine
today if it had been wearing a helmet.