Calvin and Hobbes by Bill Watterson for September 07, 1989
Calvin: The fearless Spaceman Spiff is being pursued across the galaxy by dreaded scum beings! They're gaining! Spiff's only chance to lose them is to realease a giant smoke cloud behind his spacecraft! Our hero throws the lever! Heh heh...just uh, clapping the erasers, heh heh... (cough) Principal: You again? Calvin: *Sighhhh* I can't believe it's not even 8:30 yet.
Twice on the first day of school! A new state record!