The tag point must only have a single event. Reduce the events in a tag point to one and save the others for future tag points.

What is the single criterion that you want?

“Left foot on the 12 o’clock position on an imaginary clock on the floor.”

Now our task has just one point of focus, the exact position of the left foot. This phrase is too long to be a good tag point, but it does describe a single point of focus. Good, now we can continue towards the perfect tag point.