BFC has just finished a scientific experiment showing a robust association between High School Physics grade and number of times one has ridden a fixed gear bike. The data suggest that a weak understanding of momentum and properties of moving bodies more generally as measured by High School physics grade is positively associated with number of times one has ridden a fixed gear bike. At the extremes, people who own fixed gear bikes (> 200 rides) had terrible physics grades, and only people who had never ridden fixed gear bikes had perfect physics grades. Here are the data shown with a Lowess smoothing curve.