We took a river cruise from Hudson NY on the first day of the Cycling the Hudson Valley ride and, being that type of guy, I spotted this redecorated rail car on the east shore of the Hudson River:

Feeding the obvious search term into the obvious search engine produced two other sightings in Minnesota during 2011. Puts one in mind of Where’s George…
Mad props: unlike most taggers, he / she painted around the car number and ID patterns.