well if we’re talking about gman appearances, you gotta put the happy gman from garrysmod flying around somewhere during the cascade…
Not really though.
Gman should be standing in the room where the two scientists talk for like 5 minutes before letting you into the test chamber (meaning you’ll see him if you go over there and look through the glass) he straightens his tie, brushes off his suit, and walks towards the back of the room, at which point you teleport away
(He would like… walk into view right when you kick the sample into the beam and his animations would be timed so that he finishes before you teleport… at least that’s how I see it)