Of course it's possible to WILD when you first go to bed, but the dream is very quick then you go into deep sleep and in your next dream cycle the memory is wiped clean.

Was your body actually vibrating? That's not supposed to happen, it's supposed to just feel like it, your body should be perfectly still, are you sure that you weren't just cold?

Anyway, if it was brain vibrations then after the second wave passes over you do a reality check. You might be dreaming that you are still trying to get there. I think that happened to me once. I'm also going to attempt a WILD tonight, let's both have one!