One day, Bernie and Hayley were sitting out on their deck, sipping on some drinks. Bernie ran into the house, got an empty 2-liter bottle from the freezer and a quarter and returned to the deck.
"I bet you money that this quarter will move with nobody touching it", said Bernie.
Hayley thought this was a sure win, however, she lost. When Bernie placed the quarter on the mouth of the bottle, the quarter began jumping on one side and making popping sounds.
How did Hayley lose?