Back in the late 1800's a stagecoach is moving quickly across the prairie.  Then suddenly a man on horseback comes riding up alongside.  From the opposite side comes a horse with saddle but no rider.  The man on the horse jumps onto the moving stagecoach, climbs inside then immediately climbs out the other side, jumps on the other horse and rides off into the distance.  One of the stagecoach passengers yells up to the driver, "Hey!  What's the matter with that guy?"
"Oh, nothing really," replied the driver, " It's just a stage he's going through!"