Snaffled said: "Hmm, I thought parking out was taught to carriage horses so they couldn't move out suddenly when people where getting in or out of the carriage. "

Entirely possible as well, as we still park out our driving horses in these breeds as well...

All of my horses love to park out cause they know it means "the end, time to get off"... I trained my mare to only do it for in hand, as she is mostly a wp/hp horse but she still insists on doing it when we line up under saddle (major taboo).