“Runaways” grabs you and doesn’t let go until the very last second. And even though there are many moments when you wish you could turn away and hide from the fiendishly scary scenes, you can’t help but look through your fingers to watch the chaos and darkness unfold. Eph (Corey Stoll) and Abraham (David Bradley) are still inside the Arnot household after beheading both Gary (Steven McCarthy) and his daughter Emma (Isabelle Nélisse). I guess lopping off the heads of “strigoi” takes a lot out of you and you need eggs and toast to refuel.