Here's a couple of Muybridge sequences (public domain) which I motion tracked and ghosted. I often turn on arcs and ghosting in Blender and Maya, but occasionally I'm not sure what I'm meant to be looking for. Neither my tracking nor the Muybridge sequences are perfectly synced but you get the rough idea.
This one was a pain to even out - There's almost certainly a mis-shoot in the original Muybridge photos.
Both of these are based on public domain material so you can download them for free and use them for commercial or non-commercial purposes. For what its worth my addition to the Muybridge images is licensed as CC-0.