Could I get in trouble if I used ripped models from facepunch in an animation reel?

[The Robster]

I'm not a professional animator yet but I plan on it. I want to know what I can get away with. I want to do something with video games but I don't want to go up to someone and have them say "That's illegal".

[ShowMeYaMoves]

[url]http://www.youtube.com/watch?v=rmQFcVR6vEs[/url]

[Reflectent]

It's probably not illegal.