, the final effect is like having two guys yelling in your face for two hours . 
(ROOT (S (, ,) (NP (DT the) (JJ final) (NN effect)) (VP (VBZ is) (PP (IN like) (S (VP (VBG having) (S (NP (CD two) (NNS guys)) (VP (VBG yelling) (PP (IN in) (NP (PRP$ your) (NN face))) (PP (IN for) (NP (CD two) (NNS hours))))))))) (. .)))
(ROOT (S (, ) (NP (DT ) (JJ ) (NN )) (VP (VBZ ) (PP (IN ) (S (VP (VBG ) (S (NP (CD ) (NNS )) (VP (VBG ) (PP (IN ) (NP (PRP$ ) (NN ))) (PP (IN ) (NP (CD ) (NNS ))))))))) (. )))