What John Mayer album can I get where he really rocks?

I hear that John Mayer really can rock on the guitar. I've seen it happen on occasion but his solo albums (that I've heard) are mostly mellow affairs. What should I get to really hear him rock? Thanks!

look for a live album
i heard his live stuff is very good, much better than what he does in the studio

Check the dumpster.

Check out Joseph Arthur if you like Mayer...