Q432: Suppose you have the Battle Jump feat, a warhorse, a lance, and a sufficiently high modifier for both Ride and Jump (say, +12, or something).
You command your horse to charge, then Leap (DC 15). At the height of your horse's leap, you use a free action to Fast Dismount (DC 20) and jump off your horse's back (a move action).
Question A) How is the Jump check resolved? We all know it's a move action, but what is the DC you'd need to, say, leap out of your horse and still meet the necessary height for Battle Jump on a Medium-sized creature? Are you considered to have had a running start?
Question B) Would the Battle Jump and the charge stack?