What do you consider to be hypnotic?

Damn. Given the title "what do you consider to be hypnotic" title, I though this was going to tie into the enhanced interrogation thread.

Anyhoo, for the record, I consider piping in a subsonic 7hz sine wave, slowly increasing in amplitude, to be hypnotic. Quite hypnotic. :)

Combine it with a human voice speaking in a very even cadence with very little inflection...