Check out this link on ice shanty.com on some surprising underwater footage on a bait suspended on a jaw jacker and the narrator's surprising findings...each one is only about 5 minutes long...
http://www.iceshanty.com/ice_fishing/index.php?topic=316888.msg3333991#msg3333991
http://www.iceshanty.com/ice_fishing/index.php?topic=316888.msg3333991#msg3333991