Let's get one more of him in there:
Know-It-All (Reading the word punched on his ticket with his thumb over one letter): "Lean" What the heck does that mean?
Conductor (Examining the ticket): "Lean" has four letters. I believe I punched five.
(Hands it back)
Know-It-Al: Hey, are you sayin' I can't read?? (Reads it again and looks back sheepishly) Oh. I'm sorry.
Conductor (To himself): Lesson learned.