“Knight and Day’’ is a movie that indulges our local audiences with a balletic high-speed shoot-out through the highways of downtown Boston. (The fantasy lies not in the flipping cars and trucks but in the notion that any traffic could move this fast on the Southeast Expressway.) After 40 minutes or so of casually destroying our fair city, the movie moves on to Salzburg, Seville, the Azores; tax credits or no, it’s flattering to think we’re in the same league. Oh, and it’s apparently illegal to shoot a movie in Boston without getting a chopper shot of the Zakim Bridge. Accept it — as far as Hollywood is concerned, the Zakim’s our Eiffel Tower.






