It would take two days to go through 10,000 sparklers if you were to burn them all one right after another. In this video you'll see what happens when you light them all at once.
A man and his nephew packed the sparklers together in a bucket and drove to the middle of nowhere. (It seems nuts to transport something so explosive back of a car, but this is Russia, after all.) With a couple of fire extinguishers on hand, they lit the fuse and got away. The resulting jet of sparkly fire was spectacular. It was a good thing they had the fire extinguishers on hand because the dry grass surrounding the bucket immediately caught fire.