I would rank this among the top five pieces of music that have influenced me the most. I first heard the piece by Schnittke when I was about twenty years old and it floored me how effortlessly it went back and forth between musical styles and eras. It's almost as if he took a hatchet to Bach, Beethoven, Stravinsky and Cage and then meticulously stitched the broken pieces back together one note at a time into a hauntingly beautiful Frankenstein symphony.
For the attention-deficit among you, here is the spectacular final seven minutes of the concerto.
But I would highly suggest watching the entire thing here because there are themes that are introduced early in the piece which surface again and again in various forms like inside jokes.
A Far Cry - Schnittke: Concerto Grosso no.1 (1977) from Cosmos Lee on Vimeo.