were watching monkeys flinging their feces at you . 
(ROOT (S (VP (VBD were) (VP (VBG watching) (S (NP (NNS monkeys)) (VP (VBG flinging) (NP (PRP$ their) (NNS feces)) (PP (IN at) (NP (PRP you))))))) (. .)))
(ROOT (S (VP (VBD ) (VP (VBG ) (S (NP (NNS )) (VP (VBG ) (NP (PRP$ ) (NNS )) (PP (IN ) (NP (PRP ))))))) (. )))