As I leave I hear an explosion and look back to see something shooting upwards through the roof!
Then something else, a brick, then some metal and tools, then furniture - the change in temperature was all it needed! The anti-gravity experiment worked!
The air above the cavorite shoots into space, causing a vacuum that pulls in the air from all around, like a hurricane! Uncle is nearby, and we are both pulled off our feet, but he is laughing! The man's insane!