The newest web-video craze is called the "mannequin challenge," during which groups of people stand perfectly still while someone moves through them, capturing video of the frozen-in-time scene. Buzzfeed has a primer if you want to see examples.
The Pittsburgh Steelers joined the action Friday - and included media members covering the team. It's kind of eerie to see the reporters and players stand perfectly still as if stuck in time by some supernatural force.