> It's a test similar to if you're in a train in motion, and you drop a ball in the aisle, does it fall towards the front or the back of the train? Once people

> It's a test similar to if you're in a train in motion, and you drop a ball in the aisle, does it fall towards the front or the back of the train? Once people are done with that they might be amused by try this one: • You are on a stationary bus, holding a helium balloon on a string. The balloon is floating directly above you. The bus starts accelerating forward. Does the balloon: 1. Move toward the front of the bus relative to you, 2. Continue to float directly above you, or 3. Move toward the back of the bus relative to you.