If you watch the version from the other hillside (post #48) you'll see all four of them, the wing man who finally catches the sled, the rider and the other two. First see the last 2 about 3:30 in, still sliding. Then around 3:45, 4:00 and 4:15 in till finally all four are around the sled. One guy looks like he might have picked up some parts on the way down.