User "stollman" posted a cool 20 minute caving video in this thread in HID lights section... Worth a watch!
He has posted others in the past as well. Always worth a watch. Definitely worth looking at his other youtube videos.
Great video! I really like the assisted belay system you use to go up and down the ladder! Usually in caves with ladders like that I rappel down in front of the ladder and use an ascender on a cowstail to assist on the climb back up.
Loved the video....