"Ambulance" is best when it's content to be gleefully stupid, which is about two-thirds of the time.
It's directed by Michael Bay ("Transformers"), whose explosion-prone testosterone fests are not known for their humor. But surprisingly, most of "Ambulance" plays like a comedy. Jake Gyllenhaal and Yahya Abdul-Mateen II portray Los Angeles brothers Danny and Will, who rob a bank for different reasons: Danny because he's a maniac and Will because his wife needs surgery he can't afford.
The movie gets down to business with the suspenseful robbery and a shoot-out on the streets of downtown L.A. That extended sequence is fairly involving and seems to be an homage to Michael Mann's "Heat" but, since Bay is not the stylist Mann is, comes off more like "Warmth."
