Magic Station: The Opposite Way!

Welcome back, guy. Some of you think that water can't have magical powers, right. But here is a new trick right in front of your eyes! Get a flat- sized glass, not a cup. And a piece of paper with a left arrow drawn on it. Fill the glass with water. Place it in front of the paper. Fold the piece of paper and place it in front of the glass. BINGO! The arrow turns to the opposite direction!