What was this 00s comedy?

I just saw a clip. It features Kristen Wiig as a mother. She has a son or two, light brownish hair. The brief clip features the son in a stage play, playing Peter Pan I believe. The boy managed to fly through the wall, or got stuck in the wall. I do not recall the audience laughing uproariously, but I think the boy and the other boy in the play thought it hilarious. I am sorry this is all I can go on. Thank you.