Don't like mob stacking

[Jestyr]

http://scaing-blog-blog.tumblr.com/image/157199685474
Here is a wither skelly with a bow... arrows DO cause the wither effect.
It is created when a normal skelly stacks with a wither skelly

 

[Wither]

I admit to the fact that I do not really like mob-stacking either as I know that it can sometimes be inefficient or even dangerous. Nevertheless, it is implemented for a reason. It reduces the lag and makes the gameplay smoother.

 

[Jestyr]

I assumed that mob stacking was being used to reduce lag... and I can appreciate that and live with it, of course. Mainly I posted the pic because a helper (I forget which one) wanted to see proof of the wither skeleton with a bow.

I should edit the thread title to say "Mob stacking causes strange things to happen"