Panel 2: Dialogue based on G-Man's speech to the player at the very end of the game.

Panel 3: An Archvile is a monster from the Doom series of games.

Originally, G-Man was supposed to run around a corner and dive through a window, but there weren't any breakable windows on this level. I actually prefer him shimmying up a light pole anyway.

Posing notes: Like I said earlier, noclipping lets you pass through walls and, in effect, fly around the map, even off the ground and through the air. However, trying to pose a ragdoll when you're noclipping can be a little tough. Tapping the 'W' key while you're on the ground moves you a step forward, but doing the same thing while noclipping will zoom you a bit further, so it's hard to make small adjustments. To pose G-Man up on the light pole, I spawned a prop, I think it was a Dumpster, with a large flat surface. I locked the Dumpster in mid-air next to the light pole at the level I wanted G-Man at, then I noclipped and flew up to the Dumpster, turned noclipping off, and stood on the levitated Dumpster. That way, I could walk around normally and easily make small adjustments to G-Man. Then I jumped down to the ground and removed the Dumpster prop.