Folks I believe to have cracked the big mystery of Trevor and Johnny's encounter; as I was merely replaying through Grand Theft Auto V and arrived at the Mister Philips mission, I was just passively enjoying the cutscene delivery, the pacing, Scott Hill's performance ... and then suddenly something happened, and completely shook me out of the cinematic. A realization that ruined my appetite for the scene as the jarring occurrence just blew my mind to the highest extent, taking me away from the fiction, where I simply couldn't remove the thoughts of the developer's own.
It all suddenly became clear to me.
The entire justification, motive, and intentions the writers wanted to convey through this scene.
So, after having realized that Michael was alive during this past decade, Trevor stops his random screwing, mouth slightly gapped open, and walks out of his trailer.
Now, observe his movement and behavior.
He is insanely calm throughout this moment: he walks instead of running, he slides past the people who were in front of his way instead of pushing them out sideways, he remains quiet and thoughtful instead of blaring out a train load of profanities and insults.
Compared to the other Grand Theft Auto protagonists, he is being surprisingly 'civil', which is the complete opposite of what his characterization is supposed to represent.
Trevor isn't listening to what Ashley or Johnny are saying and ignores them. He doesn't notice Ron or Wade either. Trevor is, well, alone.
Trevor doesn't respond to any of Johnny's calls, not even when he runs up to him.
Then suddenly, this happens ...
And it was only Then, where Trevor decided to turn around, and converse with Johnny ...
This was never about showing how insane or tough or badass Trevor is compare to other leading protagonists.
This was not a moral lecture on how drugs are bad.
This was not about a duel of story-driven protagonists versus gameplay-justifiable protagonists.
This Was Merely A FORESHADOWING.
Outstanding Thunderous Applause to the writers.
MONSTROUS GROUND SHAKING APPLAUSE AND PRAISES TO SUCH MARVELOUS USE OF SCREENWRITING TECHNIQUES.