something like that in her pocket. a spark from the rock ignited it. when she dropped and rolled it rolled away and the fire department didn t see it. could be something as simple as that. the other possibility is she was on the beach in san clemente, there is a military base there and firing range there. it s possible she picked up an unexploded shell along with the rocks. martha: both of those two involve something else that would ignite next to the rocks that caused the actual explosion. but there is also scenarios where these rocks themselves could actually be explosive, right in. that is scenario number three, while we are going through our detective process. so, the earlier reports indicated that these rocks contained phosphorus. it s a natural element that can spontaneously come bus, it can burst inch in flame in the air. it s possible that she picked up several tpos for rust rocks. they happened to bang together in her pocket and create tpo