In the second choke, I remember two tight slots. One on the left of the choke as you go down against a solid wall and the second one right at the bottom where you pop out backwards over a horrible large drop and have to get your feet onto the boulders behind you to get safe.
Martin Kaye and Steve Forshaw from TSG had a trip in there once a good few years ago. Steve fell through that last hole, landed awkwardly and broke several ribs. A very painful self rescue was undertaken. Apparently they realised the futility of calling out DCRO and just got on with getting Steve out.
Not sure I'd like to experience that!
Dan.