Practicing the Tai Chi form outside is really good training to keep you in your center. When I first started practicing Tai Chi outdoors I was a little self-conscious. So many thoughts would be racing through my mind. What would others think? Often I am in the midst of the Tai Chi form when I notice someone in the distance observing me. What if I forget the next move? What if I stumble and don’t have perfect balance? Someone might think I don’t know what I am doing. So many thoughts go through my head. I am no longer able to keep in my center.
Now when I practice the Tai Chi form I still have those thoughts but I pay much less attention to them. Train with external distractions, be aware of them but don't let them hold your attention.
It is good training to keep you centered.