I think he means on the Combine homework. It's hinted that you need quite a bit of modification to travel back through the portal -- that's why Breen needed a "host body" since he had no mods.
Yeah, I shot two of the energy balls at him when I said, "Screw this" and jumped over the fence. I was sort of unsure what to do, and I hate fighting Striders, so the best option was to get out of there. It worked out fine.
In my opinion, the G-Man is a representative of another dimension that is opposed to the Combine. Since we now know there are many dimensions, there are inevitably going to be ones that resist the Combine.
Hi. I've been having this problem for a while... when a character is talking, and I'm facing right at them, they seem muffled. When I turn away, they're talking fine. Does anyone know what this problem might be?