Dropping a Camera down a 1,000ft hole! Into the depths of the "Deepest Hole in the World"

"Deepest Hole in the World" revealed, filmed near dugway military base in the Utah desert. Filmed the morning of July 4, 2013 (the camera time stamp was incorrect).

2:40 Hit bottom
3:19 Rock dropped in hole while the camera sits on the bottom of the hole
6:45 Rock dropped in hole while the camera is halfway down the hole
10:18 We walk away from the hole with the line, showing how far down it was

See the original hole drop video here: http://www.youtube.com/watch?v=ILDD9v...

Watch us shoot a rifle down the pipe here:
https://www.youtube.com/watch?v=XmEnA...

We have no explanation for the lack of objects at the bottom... we have dropped countless rocks, bullets, fireworks, and other stuff down there. Where did it go? Also, seems to me there were some strange albeit faint sounds down there...

Our rig consisted of: a mini keychain spy camera, an LED flashlight, Styrofoam (for both padding and floatation, in case we hit water), a pencil (to protect the lens from rock strikes), fishing line, and a power drill (to reel the line back in).