On February 18,2012 my daughter died after inhaling helium. She watched four of her friends all go before Her and inhale the helium. When it came to her turn she collapsed after she inhaled. This was her first and only time inhaling helium. The doctors said she had air bubbles in her veins that traveled to her heart and lungs. Inhaling helium is no laughing matter and the chipmunk voice isn't worth your life. Please teach your loved ones that helium is dangerous.