Lunch Money - Ultimate Combo

I got into an argument with my roommate about this combo and if it was a valid one.

Person 1: Uppercut^2
Person 2: Humiliate
1: Humiliate
2: Humiliate
1:Humiliate, Hail Mary, Hammer, Hammer, 19 damage

The argument is in whether or not the humiliates stack. If they do, then the person gets to do their second attack of the uppercut^2 and two basic attacks from the Humiliates.

Thoughts?

no the free attacks dont stack each new humiliation interrupts everything before hand. so that final one would allow him one free attack.