Defensive Driving Course

DEFENSIVE DRIVING COURSE
The old professor got himself a speeding ticket, and was attending a defensive-driving course to have insurance points erased from his license.
The instructor, a poice officer, emphasized that being on time was crucial and that the classroom doors would be locked when each session began.
Just after one class started, "guess who?" knocked on the locked door. The officer opened it and asked, "Why are you late?"
The old professor replied, "I was trying not to get another ticket."
The officer let him in.