Now this is TRIPPY!

 Pink Floyd in 1967 - they started out pretty odd

https://www.youtube.com/watch?v=7c0EDM-Yu9o

Then they got even odder

https://www.youtube.com/watch?v=H3DGpINHX5Q

And then they took lots of ACID - this video is mind boggling

https://www.youtube.com/watch?v=15quQUN4cfg