I try to anticipate my students' replies and reactions. I often get it right...not always.
To practise improvised story-telling, I typed up a number of silly questions. One read:
"Why are you walking around with a dead fish?"
I expected the story to revolve around why they had A FISH in their hand. Instead, every single student focused on the fact that the fish was DEAD.
Fish mongers in Hong Kong sell fish from tanks, poured into water-filled plastic bags where it can happily (?) swim about until cooking time. An already dead fish would warrant complaints. Silly me!