A couple of things: Jensen was legitimately scared at first, you can tell and Jared's this adorable man-puppy that goes "BLAAAAAAAAAAAAAAAAAH" and I just can't.<<I love this comment, especially about Jared being a man-puppy because he is!
This is why, Dean could stay Cas' hand. Even though he could destroy Dean without thinking hard about it. Dean calls it like he sees, blunt so Cas can get it. As only a close friend can pull us up short when we screw the pooch.