A quick question about your pinky and thumb

So the other day I was doing my usual VDIM routines, I was doing my reactive tracking and for some reason when I was doing cfsi thin when the target was changing directions I randomly started using my thumb and pinky along with the other parts of my hand and arm to track the target, now I only did this for I think 1 more run of the scenario before I went back to how I normally track the target, but I was curious if anyone else used their pinky and thumb to assist in their strafe tracking or just tracking in general?