Glad you got to experience the soft gait! Then he is likely doing a rack or a running walk, as those are typical of that breed. But they will choose whatever gait is more comfortable for them. My old TWH preferred the foxtrot. If your friend's TWH tends towards trotty, then he might be choosing foxtrot as well. If he's pacey (and most TWHs tend towards that), then he might be hard-pacing under saddle when he gets out of gait. That will feel bouncy, but w/ a side to side roll-y kind of motion. A lot of TWHs have a hard time w/ cantering, and when they do, they often do a 4 beat canter (instead of the typical 3 beat). Very comfortable to ride!