Why do i get these Jolts?

[Markness.]

supposedly it happens to every boy when he pee's but i can never feel it, ah well

never felt it either

[CrabRacket]

Its normal! Its just the activities in your body. Like when your nearly asleep and you think your falling and you move your leg really quickly without control.
Nearly everyone gets it!

[Inseriousity.]

I don't get jolts...

I do feel like I'm falling and my bed lowers... Very weird...

[Stephen]

I get that alot when i fall asleep but soemtimes i get it in class at school when my teachers shouts at me and tells me to wake up