What should I do with the pail?

Hint 1 of 14:

It can only fly around like that because it is so light.

Hint 2 of 14:

If you could find a way of weighting it down, it wouldn't be able to move.

Hint 3 of 14:

But as you probably know if you've tried, you can't do anything to it while
you're near it -- the pail will see you and move.

Hint 4 of 14:

Try going back a screen or two and look for a place to set something up.

Hint 5 of 14:

A catapult might be nice.

Hint 6 of 14:

You'll need something flat to act as the lever and something that you want to
throw at the pail.

Hint 7 of 14:

A flat board would be very useful.