everything except someone pulling the pin from a grenade with his teeth 
(ROOT (NP (NP (NN everything)) (PP (IN except) (NP (NP (NN someone)) (VP (VBG pulling) (NP (DT the) (NN pin)) (PP (IN from) (NP (DT a) (NN grenade))) (PP (IN with) (NP (PRP$ his) (NN teeth))))))))
(ROOT (NP (NP (NN )) (PP (IN ) (NP (NP (NN )) (VP (VBG ) (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ))) (PP (IN ) (NP (PRP$ ) (NN ))))))))