There are certain classes I dread covering. In this particular math class at the continuation high school, the students rarely do any work. (The teacher assigns work. And he tries to keep the students in line. But they've decided that this is the class where they won't do anything, so they don't.)
I passed out the assignment. Offered my assistance. (It's math. I can handle just about any topic.) Then I took my usual perch.
As per normal, they ignored the assignment. Suddenly, the lights went out.
I took a quick inventory. The sky outside was cloudy, but there was enough light in the room to see. They were doing worksheets, so their assignment required no electricity. They could continue "working".
"We can't do anything now. There's no power."
Not that they were doing anything before. I pointed out that they could do their assignment perfectly well even without power.
Less than a minute later, the power came back on. Crisis averted?