This sounds like something I'd have done as a kid:

James Campbell, 62, received a deferred sentence last week for assault stemming from the Oct. 8 incident. The charge was leveled against Campbell after a 12-year-old passenger on the bus he was driving reported that Campbell slapped him across the head.

Wood said the dispute between Campbell and the student from C.R. Anderson began when Campbell objected to the boy loudly repeating the word "penis" despite Campbell's request to stop.

The boy's response to the bus driver's request was that "penis" isn't a derogatory word, but is in fact, a scientific term.