Near the end when Beth goes back into Barry's room to confront him about the whole Boston/Austin misunderstanding, Barry is still trying to get the snake to eat the mouse. When the weird stalker-type guy Jacob shows up, the snake bites Barry's hand. Barry begins screaming hysterically and eventually flings the creature toward Jacob. The next camera angle shows the snake view as it flies towards Jacob's neck. If you watch closely, the (fake) snake's mouth doesn't even come close to touching Jacob's neck. Instead, Anthony Rapp (Jacob) grabs the snake by its neck (if a snake had a neck, that's where he would have grabbed it) and just holds it there. This is very hard to explain, but if you just watch this part, you'll see what I'm talking about.