How To Freak Out People In The Park

This is a master named Tong performing a Xingyi routine and then some Bagua work around trees in the park.
I'm not sure of his lineage. There are a few things in his Xingyi that I find fault in, and his Bagua demonstration is evasive movement and not technique oriented. It is however, a pretty good demonstration.
What I thought was interesting was the people that were watching him in the park.
I live in the deep woods and mostly practice outside in private. There are times however, when I find myself practicing in a public park. I usually try to pick a corner out of the way of people, but you just can't hide.
There are lots of whispers as people go by, sometimes explaining to their children what that guy is doing over there.
I remember a comedian on a TV show mocking "The Tai Chi guy in the park". He wanted to know how many dead people were in his freezer.
In the demonstration above, the Chinese people seem pretty used to martial artists practicing in the park. Over here in the states, people find it odd, or amusing, or threatening.
Do you practice martial arts in public? Have you had good or bad experiences doing this?