Embarassment Is...

...realizing that the class you are teaching for the first time this quarter ends on the half hour, not the hour, and therefore the fact that you are rushing through the material must seem extremely amusing to the students who know the class ends at 20 minutes after. Doh. Doh. Doh!

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Not sure if that helps, but that happened to me as well, and I learned my lessons from the incident. Lesson 1: always prepare more class notes than what you need for today. Lesson 2: one should be able to discuss the interpretation of QM for indefinite amount of time, with zero notice or preparation.

Luckily I caught myself and everyone got to laugh about my stupidity.

BTW I can certainly pontificate about QM for an indefinite amount of time!!!

We tried to warn you, but you were so worried you kept rushing :)