Whoa! Nice!

I've had experiences similar to yours. Two that I can remember having where during my Calculus class, and during a train ride. At the time, I was so intrigued by what was happening that I didn't bother to open my eyes to check if I could really see my surroundings with my eyes closed. Maybe I was entering a deep state of meditation where my remaining senses were heightened to the point where my mind could draw a picture of what was happening without seeing it.

As for WILDs during the day, maybe it nearly worked because I was so excited and I had my heart deeply set on achieving a LD.

What supplements do you use? They would come in handy when I'm nearly asleep and need to take a test early in the morning.