Back in the ancient days, my friends and I would meet every Saturday and go to an Internet cafe for a few hours of playing multiplayer games over LAN. Mostly StarCraft: Brood War, with a mix of Unreal Tournament and Quake 3 Arena. During the week, we'd all play these games alone, in single player, figuring out new tricks to unleash on each other the next time we met.
One of these weeks, I've learned how to properly play Terrans against the Zerg, and was about to demonstrate my knowledge by steamrolling my friend with an army of Marines and Medics[0]. In that game, my friend went for his usual tactic of harassing me with Mutalisks[1] - an effective technique, as long as he avoided the main body of my army. Well, on that day, he wasn't careful enough.
At one point, he accidentally flew his entire (by that time pretty big, I think 24+) swarm of Mutalisks straight into my M&M army, which was just staging to launch an attack. My units took about 5 whole seconds to destroy most of his force - but the overlapping audio of dying Mutalisks pretty much saturated my headphones with high-amplitude noise. This was so unexpected that I wasn't able to comprehend what's going on around me (both in-game and in real life) for good 30 seconds, my vision blurred and my head was spinning.
Having wasted his entire army, he lost that match. But I keep thinking that this could have been a viable stratagem. If he sacrificed half of his army like this to break my focus, he could've crippled me with the other half. And ever since that day, I kept my headphones at half the volume.
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[0] - M&Ms, aka "bio", was the usual Terran army composition against Zerg players in Brood War. Zerg armies consist mostly of weak but cheap units - compensating individually low DPS and health with quick, mass production. Terran Marines are also cheap and low DPS, but in 2:1 ratio with Medics, they're healed faster than Zerg units can kill them, so a big ball of M&Ms is unstoppable to an inexperienced Zerg player.
[1] - Weak, cheap, annoyingly fast flying units. Perfect for distraction, but their low DPS makes them completely useless in a straight fight against Terran "bio" army.