The volcano erruption? (can I say erruption on here? :d ) Those are always impressive to me. I don't know why. All of the natural disasters are. I'm not saying they are good, but impressive none the less.
My dad was stationed at Ft. Lewis Washington when Mt Saint Hellens erupted back in 1980. We didn't see the actual eruption, but the aftermath was incredible. There was ash piled up everywhere like snow. I still have some in a quart jar.