David Crawford has created an interesting Flash-based website montage of stop motion photographs of people traveling on subways in cities around the world. Perhaps the most hypnotic is Series #13, which combines "footage" from London, Paris, Boston, New York, and Tokyo into a roughly 7 minute animation.

According to the website: "Each installment’s modular structure has provided a library of building blocks that have been edited into a linear animation approximately 7 minutes long. The algorithmic montage constituting each clip’s DNA remains intact, while the individual sequences are now composited within a linear framework. The speed of the transitions is based on network connection speed."