After you Download FlexiMotion, you can check out the sample scenes in the Packages/FlexiMotion/Samples folder.

01 Introduction The difference between regular animations and FlexiMotion.
02 External Forces Use an AccelerationModifier or WindModifier to apply external forces to the simulation.
03 Simulation Root Use a SimulationRootModifier to simulate in an object's local-space instead of the default world-space.
04 Scale Use a ScaleModifier if the simulated objects are not at (1, 1, 1) scale.
05 Update Rate Use a DistanceBasedUpdateRateModifier component to improve performance by updating the simulation less often when the character is far away from the camera.
06 Benchmark Measure the performance of FlexiMotion or another system.