I didn't find these tidbits in time for Halloween, but you can tell your kids these things now and they will think you are cool.
When threatened, the hairy frog, or 'horror frog,' intention-
ally breaks its own bones to produce claws that protrude from
its toe pads.
AND
If cornered, some horned lizards species can shoot their
potently foul blood from their eye sockets up to six feet.