Go with Hagrid to get your supplies.

From Thread 1

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

You wonder where the motorbike came from, the 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?'