Scream, then try to use your wand. It doesn't work, so you run away.
Continue to take the test, silly. You don't want to get a bad grade!!
Try to fight it, but you lose and it bites your leg.
You run away to the common room and you pretend that didn't happen.
Luckily you know just the right spell for this situation.
Run to Professor McGonagall and say that Malfoy did it.
Punch the food and get a terrible shock.
Read it, oh course. Knowledge is Power!
Run to a teacher and get info.
Pay someone to read it for you
Cast that spell you know - "Rubbadoo" - that would make him bounce if he hit the ground.
Do nothing. It would be great if he fell off his broom.
Tell Hermione to cast that spell she knows that makes people bounce.
"What, hunh, did you say something....I really wasn't paying attention?"
"Everyone know it creates the "Draught of Living Death", a potion that brings on a deep, deathlike sleep that can last indefinitely."
"Daddy said that I don't need to learn how to make potions, I can always buy them."
"Snupe...blurp...gurgle...slup" and then throw up because you are so nervous.
Here's an interesting quiz for you.