Birthday balloons falling limply to the ground. Satellites, medical scanners and TVs fading to black. And twinkling stars in the night sky disappearing one by one. All in just five seconds without helium. What would the loss of helium do to your body? How would the rest of the Universe react to this molecular on-off switch? Could this bring about the end of our Solar System? How could it affect CERN's Large Hadron Collider?