I'm curious about HI/sounds. Do they occur when your brain stops receiving input from your body, or something?

@Lordalmar: I've been reading up on WILD'ing recently, and your experience sounds like what some of the guides described.

This is from Seeker's The Five Phases of Wild tutorial.

Originally posted by Seeker
Along with images, you may experience sounds. It might be a mild and soothing sound, or it could become quite scarey. I've have heard loud sounds like the screeching of tearing metal. Just remain passive and watchful, do not allow it to scare you into full conciousness.
Can't really say whether or not hearing/seeing the same thing every time is normal, but I'd guess that it's pretty common.