Stop laughing. In fairness, jumping jacks (aka the side straddle hop) are an unnatural calisthenic. We just think it is as normal as can be because we don’t remember how stupid we looked in kindergarten when we learned how to do them.
Ok. Start laughing again.
*** Update ***
I can not stop watching this video. Every ten minutes I stop working, and watch it and laugh hysterically. The last time this happened was with this piece of excellence:
Still the greatest mash-up of all time.
The Star Wars mashup is pretty good, too.