Few demos are as simple and surprising as this one.

• Chain appears to levitate as it falls out of cup.
• Elevate cup above floor 5 to 7 feet. Pull end of chain out of cup to begin initial descent. Chain will self-siphon.
• While the chain falls at an accelerating rate, a standing wave develops above the lip of the cup and levitates.
• See a brief youtube video here.
• See a slow-mo video here, with a conceptual explanation.

Located in L02, section B-3.