Great technique: Outer hand compressing the mat's inflation level, inner elbow almost but not quite touching the water, inside flipper dipping in. +of+Photo+14.JPG)
Nice, moderate turn, bank-wise. Just the right amount for the situation.
Greenough...late 60's...Converse/Hodgman "Stripes Down" mat. The offshore texture provides enough tension so he can bank all the way over without his fins touching the water.
Tightening your grip on the outer front corner and burning a turn off the bottom feels great. And on the right wave, it can generate a gear jump...or two! 
