Goofy hiccup in the game....
Toward the last part of Follow Freeman, when the strider, or whatever it is called, is supposed to blast a hole through a wall of one of those blown up buildings so you can continue, somehow I had killed it too quickly and it never got to blast the hole. I played that one spot over and over and over again, not being able to go forward, as I had quick saved it after I had killed the strider and kept restarting after that. I had to read a walkthrough because I couldn't remember where I was supposed to go at that point and I thought I was perhaps missing something or doing something wrong (it was the second time playing it). How I had enough rockets to kill it before it could blow the hole in the wall is beyond me. I played for almost three hours before I read about what was supposed to happen. I had to restart the entire level so I could allow it to blow the hole in the wall so I could go forward. You'd think that the game wouldn't let it die until it blows the hole in the wall, even if you hit it five times.
I wasn't using any cheats, so I guess it is just a glich. Oh well...life goes on.
"Can you get me an anxiety pill, please?" - Airline