It was small and round and black about the size of a Magic 8 Ball and it had a designer label Louis Vuitton logo on it . Neither of the women caught it and it landed on the ground . One of them picked it up from the ground at their feet whereupon it exploded in her hands with a very loud noise and a massive flash of flames and light .
Question: What may have caused it to explode ?
The answer to the above question:


The drop onto the ground .