There is video of Matt Damon going off on Adrian Grenier.  Really going off, as in using the “F” word and everything. Not a side that Matt usually shows off!

More pictures of Matt and Adrian after the chew out…

Matt and Adrian were filming a public service announcement. From Gawker:

This YouTube video came via a tipster who writes, “Hi; I’m not sure how this works, but I got this footage from the set of Entourage the other day. Matt Damon was directing a PSA starring Adrian Grenier and he flips out on Adrian in front of everyone! [It] even shows Jeremy Piven as he tries to keep the peace – but Matt totally loses his cool and goes off.”

Now, it looks like the chewing out was sincere, but others say it is hype to get the charity recognized. Watch the video:

What do you think – sincere chew out or staged?

Photos: Bauer Griffin