There is a species of beetle that can shoot a 2-inch-long, sharp-tipped spur from its abdomen. - Apparently.
The bombardier beetle (Brachinus sp.) has this remarkable defense mechanism to deter predators. When threatened, the beetle mixes two chemicals in its abdomen, which then explode to create a hot, caustic spray. This spray is so potent that it can reach temperatures of up to 212°F (100°C) and kill small animals. This unique ability has been observed in various species of bombardier beetles, which are found in tropical regions around the world.