Picture the classic Mothers of Invention albums such as “Absolutely Free” or “We’re Only In It for the Money” or maybe even “Apostrophe.” Now adjust it to something more serious, more epic, and more poetic. That’s what this album is like, maybe. This surely isn’t for everyone but it displays tremendous talent. If you’re prone to skip, at least slow down and take in “Casimir Pulaski Day,” which is not very much about Casimir Pulaski Day.