John Mayer explains SRV

"There's not a lot of people you hear bootlegs, you hear demos, and you go, 'Wow, this guy figured it out before he even walked out of his house. And what that thing was, was half brutal force and half finesse. 

It's...bend as hard and as fast as you can bend, but hit the note like a paper airplane landing perfectly on the street...

To play like Stevie Ray Vaughan, there are some people - myself included - who, given certain time of day, certain part of the set, certain culminating energy that happens in the room...you can play with that same intensity. 

But you can only do it for about...20 seconds. And then your entire arm cramps up. And you got nothing."

There is an old joke about Stevie. Stevie made a deal with the Devil. No one knows what Stevie got, but the Devil got guitar lessons.