You shouldn't rob anyone, but you definitely shouldn't rob someone who is a professional MMA fighter.
MMA strawweight Monique Bastos was on her way to the gym when two men attempted to steal her cell phone. Little did they know, she could very easily defend herself.
The entire encounter was posted to Reddit, and user 1Ender provided a rough translation of the man being held in a "triangle" by Bastos.
So just remember would-be robbers, tread lightly. You may just get ahold of someone like Bastos.