What are two ways that frogs defend themselves from their enemies?

Male amphibians have very large penis's and when in danger, it gets erected and is used as some kind of natural hammer. The amphibian pounds the predator until it runs away, or is killed. Sometimes, the predator is smart enough to bite the penis off, but the amphibian, like a lizard, can regenerate its penis to full size within 2 weeks. In this 2 week time frame, the amphibian has a hormone that releases liquid into its testicals to 5 times their original size to seem as if the penis was never gone. When the penis is re-grown, the fluid leaves the testicals during ejaculation.