A real life superhero? No, it's just The Rock.
While filming scenes for Fast 6 over in London, Dwayne Johnson reportedly witnessed a pair of hooded would be thieves attempting to break into a warehouse. I say "would be" because upon seeing this, Rock took off running at them while waving his fake badge around (he plays a cop in the movie) in full battle fatigues.
The assailants, scared shitless, took off running and escaped on foot.
This according to a report from The Sun, who added:
A source said: "It was so funny. The Rock looked like an action hero because he had his flak jacket on and an FBI badge in his hand. All of a sudden there was loads of gunfire and this giant dressed as a copper was about to mow them down. The lads jumped out of their skin and scarpered down the canal path and left the crew in peace.
When the story came out, Rock answered on his Twitter by saying, "I plead the 5th."