I have, (new to me) Half Life 2 Game of the Year Edition - and am working through Half Life Source first.
I'm in SURFACE TENSION and have worked my way through to the point where smashed a grill on a roof, dropped down into a pool of water and climbed out of the water into a pipe - As I went down the pipe, a marine opened the door, placed a charge and I turned and ran back and jumped in the water. A big fireball from the explosion came down the pipe. When it cleared, I climbed back out of the water and went down the pipe - and there I am - stuck - the end of the pipe is "closed" and I can hear voices but can't get out. I even resorted to going to a walkthrough - which seems to imply that I should be able to go right out the end of the pipe. No Can do.
Any ideas? Am I just totally missing how to do this? Is it some type of game glitch?
Anyone have any hints or sympathy?