It's sleep paralysis, which means you've awakened so quickly that your brain hasn't had time to send the message to the rest of your body.
they call it sleep paralysis. for everyone you ask about it, you'll get different answers. it doesn't seem to be dangerous, just scary when it happens.
Sleep paralysis scary stuff
you had a night out like i did and had to much to drink ..
I agree with Boxingbro. Also night terrors are similar to that..like a nightmare that doesn't go away when you wake up. It's scary but just try to stay calm..it will pass.