Hey fam,

I noticed a drill that I was familiar with at 12:50
http://www.youtube.com/watch?v=WiVDSzSW45s

Here's my understanding of the evolution's of the drill:
http://www.youtube.com/watch?v=FStBgOBXSts
http://www.sandiegofitnessmartialart...-quarter-drill

Does anyone else drill it? Any differences? Similarities?