Robert Pattinson grabbing a security guard's face and pushing him -- it's clear that he has some stored up aggression that obviously needed to be released.
As you will see in the clip, Rob got a hold of the guy while exiting the Troubador club on Friday night. I guess it's safe to assume he got a little annoyed at the crew of paparazzi who were waiting to take pictures of him as he headed towards his car. All of a sudden he reached out and pushed the dude, who he apparently thought was one of the obnoxious photographers, not someone who was trying to protect him.
yikes!keep your kewl Edward-