I noticed two things
Alien
In the first film I decided to focus on Ash and his behavior towards the discovery of the Xenomorph. Since it's revealed he's an android trying to ensure it's survival over the crews. Suddenly all of his actions are more clear, especially when telling Ripley not to go after them, or when he lets them in without authorization, he didn't forget who was in charge he just didn't care.
Aliens
In the sequel when we get close up shots of Hicks falling asleep it also cuts back to Hudson bragging about how badass they are. While he does this we see Hicks clearly awake while Hudson is talking. It's something I though was kind of funny.