There is a second cracking noise. Before this sound even reaches her ears, the rocket darts horizontally like a minnow, makes one or two minor cuts to correct its course, zeroes in on that sniper's perch, up in the water tower's access ladder. There is a great nasty explosion without any flame or light, like the loud pointless booms that you get sometimes at fireworks shows. For a moment, she can hear the clamor of shrapnel ringing through the ironwork of the water tower.