Need an explanation on this weird sound that I caught while recording

Why am I able to crack my arm so easily?

i cant lift my arm above neck level without my shoulder popping

I have a random lump on the side of my neck.it's very hard. is

Should I be able to see heart pounding thru the neck?

Apparently your fingers aren’t supposed to do this… (sound

reliably able to elicit twitching on the top of my foot and my

18 have been able to see my pulse in my neck for a few days now

My neck cracks infinitely. Is this normal? (Sound on video)

Strange sound coming from my bladder area

Why do I always make this sound after I eat?

Wtf is on my neck.