After an day of washing heavy old machines, i was in desperate need of some energy to get me going for the evening. So I bought a coffee at the train station and did some ultra speed sketching: trying to capture the people on the escalator: i could see the persons for approximately 10 seconds, but at the beginning of those from the front, and in the end from above (or the other way around). I stood no chance - but it gave me the energy needed!
Brushpen, A5, 20 min, central train station zurich
Actually, it had a lot more people....but it was really funny