It happened twice, first i tried to kick a boy in my dream and i kicked the wall (it hurt a little bit) and today i was trying to kill a monster that looked like a mole in my dream and when i woke up my foot was moving. My friend told me it's dangerous because i don't have sleep paralysis and i could be using a knife in my dream and then do it in real life but i don't believe him. What's your opinion?