The WW1-era explosive device was discovered in a harvest of potatoes sent to a Hong Kong crisp factory.
Students who are bored of throwing the javelin or discus can now engage in a spot of grenade-tossing instead.
Duke Robotics has come up with a weaponized drone capable of aiming and shooting while in mid-air.
Police in China were left shocked after the man admitted to using the explosive device as a nut cracker.
A Colombian soldier had been on patrol when he accidentally fired a grenade launcher at his own head.