Texas horned lizard has a peculiar way to react against attackers: By squirting blood from the eyes, it can confuse coyotes, snakes, ravens, and other predators. The first step involves constricting the veins to stop the flow of blood to the heart. The next step involves applying pressure to the ocular sinuses in order to squirt blood. Then it shoots a stream of blood that reaches beyond one metre away. The same mechanism comes in handy when it comes to removing debris from the eyes, if you don't mind the stain of blood...

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bbc.com/a-horned-lizard-can-shoot-blood-from-its-eyes