On the dropship down, Hudson swaggering in front of Ripley. His swaggering makes his later breakdown all the better - and then he picks up again.
Hudson: We got sonic, electronic ball breakers! We got nukes, we got knives, sharp sticks...
On the dropship, many of the Marines are swaggering. Hicks falls asleep. The camera returns to him a couple of times just to show it.
Sgt. Apone: Somebody wake up Hicks!
Bishop is about to crawl through a tunnel alone to the Comm Relay in order to remotely call down the spare drop ship from the Sulaco. Vasquez hands him a pistol to protect himself with. He takes it, turns it over in his hand briefly, and promptly hands it off to Ripley, evidently finding it entirely useless to him.
Newt provides a couple of small ones.
When Ripley has driven the car out of the first alien attack, she asks if Newt's okay. Newt gives her the thumb's up with the most deadpan expression on her face.
Newt has found a marine's helmet and is wearing it while Hudson is having a freak out. When Ripley reminds him how long she survived, she says "am I right?" and Newt salutes Hudson. Again her expression is hilarious.