it's a WILD you're probably doing... you're focusing so hard and for so long that you basically end up falling asleep while your mind is still alert.

and i have to say, you're one of the lucky ones who can actually do a WILD in no time (or so it would seem)... some people take as long as 40 minutes or one hour to do a WILD, so it becomes challenging to keep your thoughts from trailing off and just falling asleep... but you seem to have it, so yeah... keep doing it