The magician inserts a modeling balloon into the tube and pierces it with two solid spikes. The balloon doesn't burst and stays full!
Show the inside of the tube and your audience will be able to see two spikes penetrating the center of the balloon. Remove the spikes and show that the balloon is completely and incredibly intact.
This illusion uses a totally new principle that defies detection by spectators. The new method looks and feels absolutely fair, as if no trickery could be involved. This really is the definitive version of the balloon penetration effect.