To act or react, which is more crucial? Usually this question intends to elevate all our actions to the levels of conscious and awareness and missing the point that even in our aware actions we are still reacting to something prior to the action itself. Meaning that both acting and reacting are two inseparable concepts that co-exist in the same situation. As a result, the wheel of acting and reacting is eternally in motion leading to progress and evolvement in life. Therefore, acting and reacting in practice play a role in research studies. We will discuss theatre acting and audience reacting to it in a novel method that involves robots on stage within the context of HRI experiments.