Do people have this kind of dreams?

Does anyone get dreams that something insane or scary comes towards you and you can't move? I had two kinds of these dreams. I had one dream i was sleeping and someone came into my room with a knife in his hand and walked around my bed with a eerie smile on his face. its pretty freaking crazy. Another one is like a dark figure, (i have no idea what it is/its like a human figure) just comes closer and closer and i am like frozen/can't move on the bed. that one is crazy too. I am just curious does anyone have these dreams? if you do, what they like? haha i know this makes me sound crazy but i am just curious.