Cyber Crap.

Fake notifications for fake stuff. eg: Chain emails. A very common chain mail would be about Hotmail closing down and requiring you to forward the message to 15 other people unless your account would be deleted. This is obviously fake as even people not using Hotmail get this. Another one would say that if you do not forward this email to x people in x minutes you will die and if you do you will have good luck with stuff, giving some stories about people who don't forward the message that die and people who have good luck  when they forward it to x   people. All of these are fake. Even though the Hotmail hoax had a website from BBC supporting it, BBC said that Microsoft was CONSIDERING closing down Hotmail and making it a paid service.

Or it could be a fake advertisement.

really fake...you can't walk on water, its not possible.

The video of walking on water was actually made by a platform which could not be seen through the water.