Okay, so he had freaked out more than she thought he would. She watched him trying to get the door again, before reaching out to grab both his arms, pulling him as far away from the door as she could.
"Would you stop doing that! It's not going to help. And there aren't any spiders, it was me."
She reached up, repeating the action on his neck so she could prove it and at least try to calm him down.