I'm currently playing an epic level barbarian. I have a number of abilities that allow me to attack as a free action after I critically hit someone. I've even gone to the length of making a flow chart in order to reduce the time my turn takes when I critically hit.
The question I have, is if I critically hit on one of the free attacks granted from my critical hit, do I then get to start my flow chart over again?
Many of the abilities are gained from my paragon, class, and epic destinies. They do not require minor actions, and many of them don't specify if they take an action at all.