This one is probably a military urban legend, although debunking them is next to impossible;
During the Vietnam war, Russian "trawlers" sailing near Guam and using state of the art radio intercept equipment used to observe B-52 take offs and warn Hanoi. The NVA forces frequently moved out of the target area shortly before the bombs arrived. These "trawlers" used to sit off the end of the runway in international waters. We made several official complaints about these tactics, but the Russians kept doing it. Our pilots were angry about this, one decide to do something about it. On the next mission he took off and after gaining enough airspeed, broke from his flight plan. He banked his B-52 to a low level pass right over the Russian "trawler". Before he passed over the boat, the pilot opened his bomb bay doors. The whole aircrew said it looked like an anthill with what must have been the entire "trawler" crew jumping overboard. The B-52 buzzed the boat at low level, the pilot closed up the bomb bay and continued on the mission.