I had success with WILD before without feeling SP. The one and only time I felt SP was when I was guarding in watch tower in the desert. It was like 3 AM and I was really tired so I put away my gear and my rifle and sat on the little chair. I closed my eyes and listened to the wind blowing and for any suspicious sounds.

After a while I heard some strange radio tune and the sound of someone coming up to the tower. I was frightened that it was an inspection and they would catch me sleeping. I tried to get up but I couldn't move with any part of my body. I thought to myself how cool this SP is but too bad that I'm busted.

I struggled to get up and eventually I jumped out of the chair grabbed my gear and my rifle opened the door and there was no one there it was just a sound hallucination in SP. Such a relief I felt it was a very cool experience.