I can predict, I just don't understand. I was taught, from the time I first learned how to walk, that you walk to the right. Ever been to Ryerson? I can be in an empty hallway, in Jorgenson hall, and as I'm walking my shoulder is almost brushing the right wall. Someone steps out of a stairway, to my left, crosses the hallway, and walks right at me on their left side. It defies logic. They have 12 feet of hallway to choose from and they choose that space, when the person can plainly see me?
I find that the best way to get through crowds in Toronto is to not look at the people and instead look for the spaces between them. If I do look at them, then target fixation starts to kick in. As well, it is useful I find to start to anticipate where the gaps will form which means I need to get a sense of the general movement of the crowd. Small children are unpredictable as are groups of teenagers. I also find that it is prudent to avoid passing too close to the doorways of certain clothing stores. For that matter, walking on the right side means that I should walk on the west side of a northbound street and the east side for southbound.
Part of the reason I go to these lengths is that I am six foot plus and on the wrong side of 300 pounds so if I run into people, I could hurt them. I have taken out, unintentionally, a few cyclists and heads-down cell phone users. Hunters often shoot at me in the woods.
Regarding Gretzky, his genius is (or was) predicting where the puck would be versus observing where it was.