My first instinct would be to run!!! Probably back to my room.... that has no lock in which case I would be fucked
OMG J0P0 I would scream, probably like a little girl! That would scare the right out of me. No joke
I would scream myself or pee myself. Freeze. Scream again. Run like hell. Knocking stuff down the stairs...get in car...never come back home ever again.
Im pretty sure you couldn't run from it...it looks like something that would be pretty fast, and by the time you know what's happening you'd probably be dead so no time to scream or crap your self.