“I woke up in a panic – a door in my mind had opened which I couldn’t close”: How a psychotic reaction triggered the cult 70s album that fused progressive rock and the blues – and influenced Queens Of The Stone Age, The Damned and Nirvana’s producer

Groundhogs’ 1971 album Split is a nailed-on cult classic

https://www.loudersound.com/music/albums/groundhogs-split-story-behind-the-album