have you scratching your head than hiding under your seat 
(ROOT (S (VP (VBP have) (S (NP (PRP you)) (VP (VBG scratching) (NP (PRP$ your) (NN head))))) (PP (IN than) (S (VP (VBG hiding) (PP (IN under) (NP (PRP$ your) (NN seat))))))))
(ROOT (S (VP (VBP ) (S (NP (PRP )) (VP (VBG ) (NP (PRP$ ) (NN ))))) (PP (IN ) (S (VP (VBG ) (PP (IN ) (NP (PRP$ ) (NN ))))))))