A 45-year-old man surfing on top of a northbound subway car on the 6 line died Wednesday night after hitting his head against an overhang, according to DNAinfo.

Ads like this one got me thinking: Do people really ride outside of subway cars? Do they do it to the extent that the city of New York must spend thousands of dollars on an ad campaign advising mouth breathers not to take their own lives in their hands and screw up commutes for the rest of us? And if you were going to…