I'm pretty new to this community, so I apologize if I end up repeating a things that have been said already. Here are some things I noticed about Adam's arrival home (around 48:50).
Immediately before this scene, Betty talks about seeing whether there was an accident on Mulholland Drive. Adam arrives home early, causing an "accident." Diane's limo stopped early, related to a romantic moment that made her think Camilla might still be interested, another accident. Diane was late to the party, making matters worse for her. At the next scene in this location, Kenny (also in a limo) is too late to Adam's house to catch him. Upon seeing Adam at the audition, Diane runs off saying she's late. (Of course, there could also be connections between being late and being pregnant.)
The amount of pink and green in this scene (plants, pool chairs) makes me think that it relates to something that happened in Diane's bed.
Adam's license plate reads 3HYE470.
When Adam approaches the bedroom door, there's some sort of clinking noise. The only thing shown that seems like it could have made that noise is the vase holding the yellow rose...maybe attention is being drawn to the rose because of DeRosa.
It appears that the top shelf in the shot of Adam entering the bedroom contains books about wealth and wealthy men...I could only make out the titles "Wealth 101," "Sam Walton," "Iacocca," and one called either "The Mises" or "The Mists."
There's half of a small orange/tangerine sitting on the sink, and half on the kitchen island.
Gene's shirt appears to say "North Shore" on the back.
Most significantly, I think that the sound effects when Adam is hurting Lorraine are greatly exaggerated. Notice that there's nothing on the counter at first:
When Lorraine is on the counter, everything is in the exact same position as before:
The noise during the struggle indicates a lot of large utensils or dishes being clanged against each other, and when Lorraine jumps down it sounds as though a bowl is bouncing on the floor. But nothing on the counter has moved and there aren't even any objects that would make those noises. Could this be Diane remembering that she still has DeRosa's dishes? It seems likely that Diane was cheating on DeRosa with Camilla and that this mirrors that, including DeRosa moving out. Notice that the box of dishes she picks up includes a drying rack, so it's not inconceivable that it would also include large metal utensils.





