down the toilet with the ferocity of a frozen burrito 
(ROOT (S (PP (IN down) (NP (DT the) (NN toilet))) (PP (IN with) (NP (NP (DT the) (NN ferocity)) (PP (IN of) (NP (DT a) (VBN frozen) (NN burrito)))))))
(ROOT (S (PP (IN ) (NP (DT ) (NN ))) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (VBN ) (NN )))))))