Around the release of 2009's Battle Studies, John Mayer swung by the Guitar World studio to share the story behind the song and how he came up with its red-hot leads, as well as open up a grab bag of six-string japes.

We’ve dug out this classic video lesson from that era, which kicks off with a bevy of Mayer zingers - including a shreds-worthy tapping performance and a shambolic Sweet Child O’ Mine - before he dons his wizened guitar sage hat to dish the dirt on the tune itself.