Mu Lung Training Center(Dojo) Guide

There`s something that caught my attention,you can save at the sauna before papulatus,his exp with 2x exp is the same as the outside one(1m),but,with hurricane and sonic bullets,the combo bar is charged almost instantaneously,so,you start using invencibility and the bamboo skill,as a result,you get 1m exp by almost 2 minutes,and,as you saved,you`ll come back to papulatus,like is shown at this video.
http://www.youtube.com/watch?v=0BtU6-Cgu...re=related
A bunch of features allow you to do this,this is pretty strange,but,i think that this isnt a bug at all,at least,KMS made Dojo exactly like this.