Felt Sp Onset!

Hello
I slept for about 7 hours or less, went to a final for about 3-4 hours,
came back and went to sleep trying to WILD. Remembering blad5x's method,
I just let HI come and after a while I'd feel I was "sinking" into a dream and id
snap outta the HI and realize I started feeling the onset of SP, like a big tingly heavy
sensation coming on... but after I snapped outta the HI, the feeling faded.
Is this really the onset of SP? How do I let it develop into full SP?

Thanks!

Hmm, i'd have to say just focus on the feeling, try to enhance it, there's not much you can do except keep laying there and hope it comes on?