On the tragic death of a man in Zion's Subway a couple days ago, this video by Shane Burrows/Climb Utah gives an excellent idea of hiking the Subway ”from the top”
The accident happened at the 3:00
mark on the video, although you can't see the waterfall below.
Very sad, I really shaken by this accident>
Last year, after finishing the last rappel at the 3:17
mark, I swam the pools to the left of the rappel on the video to look up a lovely little grotto behind the waterfall (very cold even in late August) where the man got entangled.