In the video below, an elderly woman is crossing a busy road at an amazingly slow pace. The granny has the crosswalk, but as the cars maneuver around her the scene starts to look like a real recipe for disaster.

So a friendly couple tries to intervene and help the woman across. What happens next will surprise you.

The couple makes the mistake of touching the handbag the old lady was struggling to carry. This causes the slow-moving senior to suddenly turn into a spry ninja and begin viciously beating them with her cane. Talk about a good deed being punished!

The couple gets the idea and leaves her alone, still in the middle of the road. However, we are now less worried about the shockingly violent granny and more worried about any car that might get too close to her.