Oddly enough, I'd had "Give Peace a Chance" stuck in my head today. so I got in the car and started it up, and once the Sirius kicked on, I heard the last 2 or 3 second so "Rhiannon" and then Pat. St. John came on, mentioned that the next song was recorded during a sit-in in Montreal in 1969 and then played "Give Peace a Chance."
Weird.