Why are my fingers shaking/twitching? My natural hand position

Why do my calves always randomnly twitch? I get cramps sometimes

any clue why my hand is spazzing like this?

My whole chest frequently moves with my heart beat

Why dies my right leg shake so much when I apply pressure to

17 with loud heart murmurs, audible in video

Why am I still twitching?

Why can I do this with my left quadricep?

Why does my big toe “crack” almost every time I move it?

Can anyone tell me what this is and why I have it?

my hands randomly lock up and i have no clue why and was wondering

Why is this happening?