was chuckling at all the wrong times 
(ROOT (S (VP (VBD was) (VP (VBG chuckling) (PP (IN at) (NP (PDT all) (DT the) (JJ wrong) (NNS times)))))))
(ROOT (S (VP (VBD ) (VP (VBG ) (PP (IN ) (NP (PDT ) (DT ) (JJ ) (NNS )))))))