Chelsea Staub talked with OK magazine, here is what she said:

"Everything they do is a blast. I had a scene with Joe one time, and we’re supposed to have a little action in the backround before the camera comes into our scene, Joe
passes me a note halfway through it, and we’re in a school hallway, where there’s lockers everywhere. I open it up, and it says 'see you in math.' Then he walks off. He’s funny."