'eavy music...live 1969 and 1972...UK power trio...raw excess...can excess still be devastating?  clearly.  coming out of Hendrix, perhaps some others as well, Blue Cheer for example (or like Cheer, coming out of the previously mentioned Hendrix)...

"An essential rock artefact tracing The Groundhogs from their pre - ‘Thank Christ For The Bomb’ blues roots to the final live show for the classic line up of Tony McPhee (guitar and vocals), Pete Cruikshank (bass) and Ken Pustelnik (drums). Never before heard recordings from the Warner Brothers’ vaults including a vintage 1969 set from their show at the Richmond Athletic Ground (AKA The Crawdaddy Club) and their final explosive set at the Pocono Raceway track. Includes the live debut of what would become the anthemic ‘Cherry Red’ and McPhee’s seismic destruction of ‘Amazing Grace’. A career-spanning gem from the ultimate heavy rock power trio book-ending 976 days and 250-plus live shows."

“In their stage act they concentrate on being as heavy and as hard-hitting as possible.” The Scene magazine

“Performing on stage we feel that the emphasis is on excitement so we play the numbers that involve the greatest amount of movement and dynamics,” Tony McPhee told Star Pop.