There are a few things that Wengie has tried that can prove the unique characteristics that you have. One of the things that you can do is put your hands togehter with the middle fingers over each other. Keep the hands closed tightly while trying to pull apart your ring fingers. It might feel like the fingers are paralyzed and that they can’t be moved at all. You can do the same thing on top of a table. Put one hand flat on the surface, folding down the middle finger. You can lift every finger but the ring finger. All of the tendons in the fingers are independent except for the ones in the middle and ring fingers.
Another unique thing that only few people can do is to lick their own elbow. If you can, it usually means that you have a shorter upper arm length or are hyper-flexible. This is one of the things that would make you very unique if you can achieve the task.