Saw monotonix support someone at the Scala in london. was minding my own business toward the back but still found myself with the drummer on my shoulders. It was - may still be - on YouTube. Definitely memorable, more memorable than the headliner who I don’t recall.
My first thought for this thread was Alan from low wanging his guitar into the crowd at end of the road a few years back. good fortune a small child wasn’t decapitated.
And then there is tommy cooper at her maj’s theatre in '84 (but I missed that one).