Kim Rhodes on working with J2

Lynn: I was just chatting with Shoshanna Stern, who was a guest star on Supernatural this season…
Lynn: It was interesting to hear her view of the boys, because she observes very keenly – and she said, I didn’t know, when they started goofing off, like am I allowed to laugh?
Lynn: And she gave me this run down of how the crew reacts, the director, how she’s expected to react, and the unbelievable way they play off each other. That when it’s one of them, it’s fine, but as soon as the other walks in, they light up and their ages seem to drop by 30 years.
Kim: It’s like the difference between having one puppy in a room and having two puppies in a room – like it really is, they increase exponentially.
(interview credit from fangasm)