OBE vibrations in the head

[2TaLL]

Hey. There's this muscle I can flex in the brain that sends a brief euphoric chill down the spine.

When I lay down and constantly flex this "muscle in the head", it starts vibrating...like really VIBRATING. 

My question is: What do I do once I get this vibration in the head? There isn't vibrations anywhere else but the head. I'm aware that this head vibration is the same vibration we all get when we sleep..but how do I turn that head vibration into a full body OBE?

thnx for any help.