[owenmarshall]

90 minutes? At a _Dead_ concert?!

That’s enough to cover a typical Playing>Uncle John’s>Drums>Space, and probably not get all the way through the reprises. You’ve easily got another two hours of jam.

[somat]

The joke was

"I went to a Grateful Dead Concert and they played for SEVEN hours. Great song."

[dekhn]

also, they were "in tune" and just playing in a mode, rather than a typical key.