Why is it the ug/og's exercise of choice?
what the fuck is it?
I taught it for 5 years here in aus what do you want to know buddy. It is like the part in gym you want to watch. 
watch this. So the thing they flip on is a long track that has fibre glass rods about every 10cm apart and has 1 or two carpet rolls on top. A pass consists of 8 skills most start with a roundoff or a barani( a roundoff with no hands) into flips or whips then into a big skill. Awesome sport
The first "sport" I guess I ever did. At the Y.
Think of it as trying to get a year old black lab tired.
But honestly, I think its great for kids. You get to run around an jump on shit, what little kid wouldn't love that? The results are tangible, yesterday you couldnt do a backward somersault, but you worked hard on it and today you can.
I went from tumbling and swimming at the Y to judo at the Y. It was perfect.
Tumbling is falling down 101. Judo is falling down 201. 