Your mind races through a bajillion excuses as you weigh what's most likely to engage the dean's sympathies. You have confidence in your ability to make an effective delivery.
What exactly were you doing that caused you to lose track of the time?
Working alone on a tantalizing new design for my time machine.
Reading an intriguing theory that duck-billed dinosaurs raised their young much like birds do.
Brett and I were watching a dinosaur-adventure movie to get some pointers for my own filmmaking.
I was checking out Brett's new rifle.
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