Practicing weapons’ forms in a park can can attract the wrong attention. Especially if you are using metal weapons.
Once when I was practicing my sabre and sword forms in a park I had one spectator which did distract me. It was a policeman driving his van slowly through the park.
From the corner of my eye I noticed the driver stare at me.
He was probably wondering whether I was a lunatic or just a crazy ninja turtle that should be locked up.
Fortunately for me he kept driving and I avoided being disturbed.
Since then I now only use my wooden sword and sabre when I practice in a park.
I still practice with my metal weapons at home or use them at official demonstrations.