The hypothesis which states that the different emotions in our body involve different and unique physiological profiles is called autonomic specificity hypothesis.
<u>Viewed from this hypothesis perspective, emotions in the human body can be seen as time-tested solutions to timeless problems and challenges. With emotions, evolution in the human body has provided the human with at least one generalized response to tackle these problems.</u>
I would use a propeller like the first or second just from my experience. Just play around with the different ones and see which one works best for you.Don't make the propeller too thick or thin or else it may not work.
