Drive Through the Burger King You and Christine Like

As you pull into the drive thru, you see a piece of paper taped to the window, flapping in the breeze. You drive up to it and yank it off the window of the Burger King drive thru. 

Clue #1

You're off to a good start, Ronald. I have a riddle for you to solve before you can find the second clue. 

Where gravity does its work on H2O,
Is where you, Ronald, must quickly go,
If you ever want to regain your gum,
And not have it eaten by Frank the bum

The waterfall! It's the only place in town that Christine could be talking about. You take off in the direction of the waterfall. 

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