Knife cutting 10 bottles GIF

Correction: I need that knife

Check out:
http://www.zombietools.net
This looks just like one of their demos.

The most I've seen together it's three, and they are usually not lined up; more like, triangle formation; and if they are lined up, they are not that close. That's in my case, of course.

Undoubtedly they were sedated. I hate to see people mercilessly killing these prideful beasts for the sake of a demonstration.

It would work with necks as long as you don't hit the bone.