 In the chase sequence, which occurs near the middle of the film, Hickman's car is being chased by Scheider.The chase itself borrows heavily from the "Bullitt" chase, with the two cars bouncing down the gradients of uptown New York (like the cars on San Francisco's steep hills in the earlier film) with Hickman's 1973 Pontiac Grand Ville sedan pursued by Scheider's 1973 Pontiac Ventura Custom Sprint coupe.While Scheider did some of his own driving, most of it was done by Hollywood stunt man Jerry Summers.