In the future: Turn a prosthetic speech implant up to 11 and you've got yourself a sonic scream, à la Banshee. Make it waterproof and you're just as "super powered" as Aquaman Sammy "Squidboy" Paré. Special throat mics already allow for sub-vocal communication, but implants would take that a step further, perhaps facilitating the ability to speak where we normally wouldn't be able to.
Link -via Digg