Waking after you fall asleep. Ideas?

Does anyone have any ideas on how you could wake your self up (only slightly) immediately after you fall asleep?

One tech. iv tried is this:

While laying down, bend one arm at the elbow, and balance your hand and forearm in the air by resting on your elbow. Once you fall asleep, your arm will fall from the balanced position, and will wake you up slightly.

However, the action of holding my arm up creates the idea that I’m trying to fall asleep… making me unable to fall asleep.

Does anyone have any other ideas?

alarm clock!

smother yourself in the covers, you’ll wake up in SP barely able to breathe, and it will cause LDs, however you’d best get yourself up (which will be very hard and might freak you out thinking you’re dying) and uncover yourself.

wouldn’t recommend it, I do it on accident a lot and it almost always leads me into SP when I start suffocating a little bit.

fall asleep on a limb, it’ll wake you up in excruciating pain numb pain, also wouldn’t recomend…