Review: one well-timed explosion in a movie can be a knockout , but a hundred of them can be numbing . 
Sentiment: negative

Review: ms. bullock 's best work 
Sentiment: positive

Review: mind-numbingly , indescribably bad 
Sentiment: negative

Review: is the script 's endless assault of embarrassingly ham-fisted sex jokes that reek of a script rewrite designed to garner the film a `` cooler '' pg-13 rating 
Sentiment: negative


Review: the whole slo-mo , double-pistoled , ballistic-pyrotechnic hong kong action