Passing time

Yesterday was the 50th anniversary of the first rock 'n roll song to hit #1 on the Billboard pop charts: Bill Haley and the Comets' Rock Around the Clock. This article in CNN noted that

Haley and his band had recorded "Rocket 88" not long after it came out, and with the Comets (the name changed from Saddlemen) he had a hit with "Crazy Man Crazy" in 1953. That success led to a contract with a major label, Decca.

...which reminded me of the passing signs on the rear of a truck I saw back in the early 50's. The left side sign said "Go Go Go!" while the one on the right said "Crazy Man Crazy". Another truck pair (from much later) had "Grateful" on the left and "Dead" on the right, which is cooler than the traditional "Safe Side" and "Suicide".