A true Robin Hood would be sending an arrow directly dead center of an intended target and then tubing that arrow with the next arrow, seemily intentional however,

Today, we take liberties in calling any arrow that tubes another a Robin Hood.

The only arrow I ever tubed was a friend of mines on a 3D course. He was in the 12 ring and I aimed for his arrow. I sent a Beman Carbon down his big aluminum. I didn't stop smiling at him all shoot.

I've never tubed my own but I've busted more than I care to remember. It's too expensive so I rarely shoot for groups.