Heres a review I found of the gig online. http://www.skippyscage.com/reviews03/021503.html
Mastodon came on played their silly complicated rock and tried to look clever (they were alright but you know I was waiting for something else). The only notable thing they did do was cover ‘Emerald’ by Thin Lizzy which was pretty awesome, but the rest of their set was a bit, "music to do sums by."
Then High On Fire came on, three men, shirts off, hair long, and played the most full on set of heavy rock I have ever seen. They had clearly decided to steer clear of the doom rock numbers and just played a set of songs that sounded like the most righteous hardcore band ever, discovering weed but not quite having enough to slow them down too much. Raging full on, they played most of the tracks off their latest opus, ‘Surrounded By Thieves’ and all I could do was stand there with my brain running out of my ears. It's not like they tune their guitars down to C or employ some kind of ludicrous techno know how, they just sound as heavy as fuck!
I mean, come on, the bass player even had a flying V bass! Although Matt Pike is so fucking rock that he had to invent his own guitar amp to sound heavy enough (the black amp, by Matamp), but I just think that it goes to eleven. After the show we ate chips and cheese and shouted at everyone for the next three days. I think it was the best thing ever in my life.
Ian Unpeeled (the zine that covers the John Peel shows, info from email@example.com)