Well, of course! What *else* would you do?
I suppose this would strike me as a lot less odd if they'd said "and" instead of "so", but in its current state, it sounds like it's a cause-and-effect thing.
"So, class, what do we do if we see a ghost?"
"Throw a flyswatter at it?"
"No, that's incorrect. Anyone else?"
"Challenge it to a game of Twister?"
"No, that's not right either. Anyone?"
"Drive it away with a broom?"
"Yes! Very good!"