I have a few cameras that reportedly vary with how well they handle motion cadence.  I say reportedly because it's not something I have learned to see, so I don't know what I'm looking for or what to pay attention to. I'm planning to do some side-by-side tests to compare motion cadence - can you please tell me: 1) what to film that will highlight the good (and bad) motion cadence of the various cameras, and 2) what to look for in the results that will allow me to 'spot' the differ