She hoped to god that there would never be an occasion where she would find herself in the Forbidden Forest. Because it was forbidden, you know.

Mia's first reaction would be to run for her life but she figured that's not the answer the Professor was looking for. She raised her hand in the air, "Maybe it would be a good idea not to let whatever is rustling the bushes aware of your presence and then if it is possible climb the nearest tree so that you can put some distance between you and it. And then merely wait for it make it's appearance and see whether it is a threat or not."

And if it was.

Then run for your life!