Thank you Glenn Dee. I too first saw it on Adam 12. I'll bet I have looked for one for 20 years. Not really actively trying to find one, just a "Gee, I hope I see one of those some day."
It is THE fastest holster I have ever seen. You already have a firing grip on the gun. Your finger is already on the trigger (Hows that for old school?) and, when you push the button, all you do is rotate the gun. There is no "drawing" involved. Its just...there.