One of my favourite random activities that I used to do during my undergrad at Waterloo was walking on railroads. Not in between the rails, but on the actual rails themselves. I liked to try to balance myself as I walked forward, and often I would fall to the side and had to start over. Today I went back to Waterloo for a visit and drop by Waterloo Park for a walk. At the railroads I revisited those undergrad memories and walked a little down the tracks, tipping left and right as I went.