I found this ninja on my walk to a friend's house. She (or he) popped out of nowhere and onto the side walk right in front of me. Before I knew it she was circling me with her flying fists and powerful kicks.
Not sure what to do, I stayed in place, waiting, until she was done and once again back in front of me.
Then she said "Bye!" and disappeared in the blink of an eye!
I continued walking toward my friend's house and through an open window I spotted an active Karate class.
Ninjas in training . . .