want to bang your head on the seat in front of you , at its cluelessness , at its idiocy , at its utterly misplaced earnestness 
(ROOT (S (VP (VB want) (S (VP (TO to) (VP (VB bang) (NP (PRP$ your) (NN head)) (PP (IN on) (NP (NP (DT the) (NN seat)) (PP (IN in) (NP (NP (NN front)) (PP (IN of) (NP (PRP you))))))) (, ,) (PP (PP (IN at) (NP (PRP$ its) (NN cluelessness))) (, ,) (PP (IN at) (NP (PRP$ its) (NN idiocy))) (, ,) (PP (IN at) (NP (PRP$ its) (ADJP (RB utterly) (VBN misplaced)) (NN earnestness))))))))))
(ROOT (S (VP (VB ) (S (VP (TO ) (VP (VB ) (NP (PRP$ ) (NN )) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NP (NN )) (PP (IN ) (NP (PRP ))))))) (, ) (PP (PP (IN ) (NP (PRP$ ) (NN ))) (, ) (PP (IN ) (NP (PRP$ ) (NN ))) (, ) (PP (IN ) (NP (PRP$ ) (ADJP (RB ) (VBN )) (NN ))))))))))