Gait recognition. Forget face recognition, your gait has its own neuroplastic pattern you have developed over the years. It is subconscious and like we repeatedly say, your gait is a representation of the parts that are working, not working and injuries you have compensated around. Sure, you can change your gait, but it is going to take retraining over 10+ weeks to adopt a new gait pattern and gait ID.
Remember this as well, coaching a gait form change does not fix anything, you are just teaching a new pattern on their existing patterns of ability and compensation. This is our main problem with basing diagnosis and corrective homework off of just a gait evaluation, they tell you nothing of what is wrong with your client, they only tell you what your client is presently doing.