Joe, what was the ___ session like?

Hey Joe,

Not sure if you'll be prowling this thread or not, but I was just wondering which artists you've especially enjoyed having sessions with in recent years. Not necessarily on stage, but casually too. I would think that even with your talent, there has to be someone that REALLY opened up your mind with ideas or styles when you played with them.

Side note - this is very random, but I remember seeing this old thing online about when you played with John Mayer on one occasion. Both of you have your own thing going on, and I was wondering - how was that session like? You guys have both your full rigs and played each others' songs? I'm a big fan of both of your playing styles but never really heard anything more about that instance. I'm guessing it wasn't exactly a documented experience, but I'd love to hear more about it!