Tripping in a dream and waking up with a jolt is called a ‘Hypnic Jerk’ and happens because your brain thinks the body is dying
A ‘Hypnic Jerk’ also known as a ‘Hypnagogic Jerk’, a ‘Sleep Start’ and a ‘Night Start’ – is an involuntary twitch which happens during hypnagogia. This is the stage just as a person is about to fall asleep and it often causes …