I still remember being scared awake by that audio loop many years ago. Lucid dreaming had caught my attention for a while, and when they released the lucid dreaming feature I thought I'd give it a go. The media volume on my phone being set to maximum definitively did not help when that creepy voice wrought me out of sleep and I haven't tried it since. I wonder if it actually works, but can't really try it out nowadays as I'm not sleeping alone.