Factual error: When Axel and Taggart are taken under fire by the gunner with the dark glasses (who is shot by Billy), notice that the gunner stands perpendicular (i.e. at a 90° angle) to the stairs where Axel and Taggart take cover. Yet, two of the bullet holes appear in a column at the base of the stairs which would have come from a different trajectory, namely in line with the stairway and thus from Axel and Taggart's flank.
Factual error: Taggart and Rosewood try to pursue Foley from the hotel but their car stalls from the "banana in the tailpipe", and when Rosewood tries to restart it, it makes the starting sound of an older Chrysler, when the car is actually a Mercury.
Answer: There might be a deleted scene showing an extended chase scene, but as it is, it seems out of place. From what I can tell, the road was slick, like something oily was spilt on the road during the chase. I don't think it's from the fruit and vegetable truck either. The bus looks like it's breaking suddenly (perhaps to avoid an unseen wreck) and skidded out and the driver over compensated, spinning the bus out. In fairness, a licensed bus driver would probably be able to control the bus in that situation, so it was exaggerated for the film. It probably should have been cut, but I'm guessing someone liked it and kept it in for more action.
Bishop73