Miles tells his mother, played by Orange is the New Black’s Taylor Schilling that he is scared, and he runs into her arms at which point he turns into a naked dude that grabs her by the head.
Delivering a major jump scare at the end of a relatively calm trailer seems to be a trend of late and the trailer for The Prodigy delivers on that account.
Next time tell that kid to suck it up and go back to sleep.