On Sunday, the art crowd car-pooled up to Greenwich, Conn., where Nate Lowman's aptly titled exhibition "I WANTED TO BE AN ARTIST AND ALL I GOT WAS THIS LOUSY CAREER" opened at the Brant Foundation. The show included Lowman's air freshener and bullet paintings, crucifix-like sculptures made from dismantled tow trucks and a selection of fronts of old gas pumps. But perhaps the most provocative ready-made on view that day was the white Ford Bronco parked out on the lawn, previously owned by O.J. Simpson.