Rob and his Big Ol' Bodyguard

Rob was caught on set by a few fans. But no worries, the assassins were thwarted, because Rob's trusty bodyguard was at his side.  (Did you catch the sarcasm in my voice?)

You can click on the photo to see a larger version. Rob's there in the car if you look real closely.

But I have a slightly zoomed picture here:

It's a bit blurry, but you get the point. Now what's Rob doing sucking his thumb?

Picture from Twilight-Gossip.