Question on how to act angry for a short film?

Film making has become sort of a hobby of mine, were doing a short film of different scenes from different shows and movies as well as some original work. One of the scenes I'm doing is from entourage and I play Ari, I know all the dialogue for my scene, but I'm unsure about how to act angry and off the wall like he is, or come close to it. Any suggestions? It's the scene where he and his wife are in therapy after Vincent chase fires him as his agent.