Go with Hagrid to get your supplies.

From Create Your Own Story

When you get out of the hut there's a motorbike on the shore.

You wonder where the motorbike came from. A boat would probably sink with it in it. Hagrid gets onto the motorbike and says, "Are you comin'?"

Do you:

Go with Hagrid on the motorbike.

Run into the hut.

Say, "How are we going to get across the lake?"