One boss in Destiny 2 has you fight a bunch of clones. Killing the correct, "real" clone depletes a shared health pool, repeated until you win. Well, that hp pool is actually one enemy's healthbar, spawned outside the map. Speedrunners used to just break out of the map and kill the "real" enemy.

To my knowledge Bungie's patched that exploit since then - and players have found strats to just nuke down the whole shared pool by turbo-overkilling a single clone anyway.

🤣 amazing!