Two men have a lucky escape when grenade explodes

Two men fishing on a RIB in Russia had a lucky escape when a grenade exploded as it hit the water.

While there are no clues explaining why the fishermen took a grenade on an inflatable boat, the explosion was caught on camera by LiveLeak.com. The website claims that stunt was a scene from a movie that went terribly wrong.
 
You can watch the video below: