The opening credits are meant as a nod to suburban conformity and as such has some repeated themes, like joggers all dressed alike, and cars of the same make, model and color. Anyone can tell that this was done with some clever looping. But not clever enough. Watch the first set of joggers (in the white not green) as they jog down an 'S' shaped path. Keep an eye on the first jogger. The second jogger comes along and eclipses the first jogger. You would expect the first jogger to emerge shortly thereafter, as the second is moving right yet the first is now moving left as he continues down the 'S' shaped path, however he does not emerge. This is proof that the opening credits are looped as it would be very hard to re-super-impose Jogger #1 so they chose to just clip out jogger #1 at the moment of obscurity.