A teenager in Colorado mixing fireworks in a coffee grinder is recovering from serious injuries sustained when the fireworks exploded. Police say that 19 year-old Sean Ogden was trying to break down some fireworks he had purchased so that he could make bigger ones.The blast shook the home of a fire inspector who lived a quarter of a mile away. It is suspected that the friction from the grinder ignited the dangerous mixture. The teen is recovering from serious burns.