When the weapons were disturbed by some poor sucker who just wanted that cool looking sword, the bowl would shift, the fuses would light and he'd learn the hard way that there's no such thing as a free lunch in this world.
You've probably seen naval battles before in movies or on television. Two ships with high sails and the flags of their homelands pull up side by side to blow the ever-loving crap out of each other with their cannons. But actually, naval warfare was arguably more complex than your standard battle on land.
In third century A.D., the Romans attempted to seize control of Syracuse, a Carthaginian stronghold. But unluckily for them, Archimedes, the greatest scientific mind of that time, was in charge of defending the seaside city. Basically, Hiero (ruler of the city) gave Archimedes all the money and resources he needed to get creative and kick some Roman ass. With science!
"...carry the one...divide your ass by my foot..."
So Archimedes went about designing defenses to protect the city against the invaders. He constructed catapults that shot rocks and darts at various ranges. The Romans responded by lashing ships together two at a time and fashioning them with giant ladders they'd use to climb the seaside wall. That's when Archimedes deployed... the CLAW.