I guess there were two things that I was interested in, first that the heart rate plummeted immediately after ceasing the exercise and then slowly rose back to where I'd expect it to be, and second the skipping.

Thinking about some televised sports (swimming, track and field, sprint at the end of a road race), at least the winners do all-out efforts and then come to a complete stop without doing any obvious cool down. I've always heard about cooling down to help with lactate acid flushing, etc., so could imagine it really only be helpful, but not required ... but can doing so be injurious to the heart? Is coming to a complete stop really really bad, or is the heart just doing its thing the best it can? The lowest I've ever seen my heart rate [while awake] was 33bpm (~17%) and that took a lot of relaxing and shallow breathing, so to see it hit 20% (~39bpm) on the computer, and feel that it was actually going that slow, while standing and still breathing heavily, was alarming.