Wardrobe malfunction aside, there are a couple of things she and CJ did right...
Visually inspect the chamber. Also, notice the eye and ear protection. Sunglasses are not the best eye protection on the planet, but they are better than nothing.
Firm grip on the gun, snugged up into her shoulder. Though I'd like to see a bit more of the buttstock supported, considering the gun doesn't fit her at all, she should still be able to handle it. I'd also like to see a bit wider, more stable stance and I'd like to see her lean into the shotgun a little more.
CJ's demostrating good form while waiting for his target to be released. His gun's in the low ready position, finger (or booger hook, if you prefer) is not on the trigger, rather it's on the over-sized VangComp safety, which tells me he's engaging the safety after each round. His eyes are forward and he's focused on the horizon where his clay pigeon will be released.