You'll laugh at this mismatched-buddy comedy, which is remarkable, since the film itself is pretty standard stuff. What raises the level is the terrific teamwork of Martin Lawrence and Tim Robbins. Robbins plays Nick Beam, a successful ad exec until he decides that his sexy wife, Ann (the ever-delectable Kelly Preston), and his boss, P.B. (the ever-smarmy Michael McKean), are boffing. Driving out of town in a suicidal funk, Nick encounters T. Paul (Lawrence), first-time thief who eases into…