Certain situations can be very complex. Factors that distract drivers or cause them to change their pattern can arise simultaneously from more than one place, and you must try to anticipate how they might interact. I was following two SUVs one day on a street that had three lanes going our direction. One was in the right lane, one in the left. I was behind them in the middle and overtaking as we approached an intersection. The left-turn lane was jammed to overflowing, and the last car was partially blocking the left lane. A car was turning into a parking lot on the right, but was getting on his brakes, apparently to let some pedestrians pass. At my rate of travel I would have passed between the two SUVs, which were side-by-side just before we reached the intersection, but it seemed like at least one of them was likely to change to the middle lane about the time I got there, so I slowed down. Sure enough. They might have seen each other, but just as they reached the point where they had to move over or brake hard, they were distracted by another event ahead in the intersection, where a major squealing and honking suddenly arose. It looked like both drivers looked toward the commotion instead of where they were going, which turned out to be the same placethe middle lane. Neither signaled, and they swerved as though synchronized. They clipped each other. I probably could have avoided getting caught up in all that even if I had been between them, but it was much more fun to hang back and watch than try to escape.