We were waiting to see who our teacher would be for the semester.  At the start of class a short man dressed in uniform (suit and tie) entered .

After a few moments there was audible snickering.which merited a tirade from Mr Dykla on ground rules for class conduct. I thought this was overkill at the time, although the technique was successful.

Ed was an extremely capable teacher,  easily one of the best aquisitions the school made.