I saw a longer excerpt from this concert on on demand that was billed "Eric Clapton and friends but when i watched it it was obviously something that Marcus was leading and I remember seeing a DVD called "the masters" from a tour they did (in Japan?) but I guess they went with the bigger mainstream name on that listing.Actually Clapton seemed the most out of place until they did some of his stuff,on the other stuff he was just playing blues licks but he did lay back so it didn't sound bad but it was evident he worked from a different vocabulary than the others but then again Eric Clapton is a Icon and im just a guy on the internet. PS the slapping was cool with me, gave the groove a little push.