US Obesity Rates by State (1985-2008) (On the animated map, you can click stop and then page forward and backward manually.)
Pretty shocking. (Although when I see numbers that change this much, I'd like to read further. For example, they mention confidence intervals, but they don't seem to show any. And in the maps, white means "No data", so the first year with data for all 50 states is 1994. It would be interesting to see this data correlated with income or some "access to health care" metric.)
I learn about the weirdest stuff on attackpoint...