JLaw was posing for photos on the red carpet with co-stars Jena Malone and Elizabeth Banks and everything seemed to be business as usual... until she decided to let the photogs know just how they were making her feel.
The young Oscar winner was walking away when she suddenly stopped and started screaming. The other gals laughed and then just looked on - in awkward horror? - as Jen screamed "No!" over and over again.
For what it's worth, we think it was a brilliant move. Papz can be waaaay too crazy and pushy when it comes to getting a good shot and someone needs to put them in their place.
So what that she looked a little bit crazy herself? It's Jennifer Lawrence we're talking about. This girl is a born badass.