What happens when you fall into piranha-infested waters?

You're peering into the Amazon River when, suddenly, you lose your footing and fall. Piranhas dart about in the rapidly approaching water. So, are you doomed? Will your fall trigger a feeding frenzy that will skeletonize your body within minutes? Antonio Machado-Allison shares what we know about these purportedly ferocious fish. [Directed by Anton Bogaty, narrated by Addison Anderson].