it takes off in totally unexpected directions and keeps on going 
(ROOT (S (NP (PRP it)) (VP (VP (VBZ takes) (PRT (RP off)) (PP (IN in) (NP (ADJP (RB totally) (JJ unexpected)) (NNS directions)))) (CC and) (VP (VBZ keeps) (PRT (IN on)) (S (VP (VBG going)))))))
(ROOT (S (NP (PRP )) (VP (VP (VBZ ) (PRT (RP )) (PP (IN ) (NP (ADJP (RB ) (JJ )) (NNS )))) (CC ) (VP (VBZ ) (PRT (IN )) (S (VP (VBG )))))))