A show staged at New York's Felt Forum [[Madison Square Gardens) back in May 1969 ....

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Arthur Brown was of course the mad UK born stage-arsonist.
Cartoone were a Scottish rock group. They were the 1st British rock group signed by Atlantic Records but didn't seem to gel with the Atlantic bosses after going to the States [[their 2nd album was shelved & the group quickly dropped by the label).
Watts 103rd St Band were of course the LA funk outfit fronted by Charles Wright [[who had included James Gadson, Melvin Dunlap, Ray Jackson and Al McKay in their ranks), so I guess they were a bit more familiar with a 'peace & love generation' style audience.
BUT I guess the whole scene that confronted the Intruders in the venue must have been strange to say the least.
I wonder who backed the Intruders up on the show, did they travel with their own Philly band back then ?
......... or maybe the Watts 103rd played behind them).
Of course, the summer of 1969 was at the end of Little Sonny's tenure in the group, as Bobby Starr [[who had previously fronted Baltimore group BS & the Versatiles) was about to replace him.