On a side-note, I smell a guest appearance on the next Opeth album...
Yes, because clearly if one musician attends another musician's concert, it
must mean a guest spot is inevitable.
Anyhow, it would have been pretty interesting to be there. I wonder if Akerfeldt was like, "ROROROROROR--oh, wow. Hey. Hey, guys. Hold on just a minute. Is that--? Whoa, that's Kenny G down there in the pit. This is kinda surreal. And he has better hair than I do. Um...hey, what song were we doing again?"