Have you ever been falling asleep and then you suddenly feel like you are falling or maybe you hear a loud noise that startles you? 

This phenomenon is known as hypnagogia and can also include visual hallucinations. 

So you might be wondering why this happens and whether or not it is an indication of something more serious. 

This video by SciShow has the answers to your questions and will even answer a few you didn't know you had. 

Leave a comment below to let me know what you thought about the video or to tell me about your hypnagogia experiences.