kottke.org posts about behavior
Pitching slow to a young child is actually worse than pitching a little faster. "When you throw something slowly to a child, you think you're doing them a favour by trying to be helpful. Slow balls actually appear stationary to a child."
"Fads, fashions and dramatic shifts in public opinion all appear to follow a physical law: one of the laws of magnetism". "Michard and Bouchaud checked this prediction against their model and found that the trends in birth rates and cellphone usage in European nations conformed quite accurately to this pattern. The same was true of the rate at which clapping died away in concerts."