I hurt my foot the first night on the hump. We were going up this single track trail into the "Quantico highlands" in pitch black (like 2 o'clock in the morning) and I stepped on a rock or something. It was so dark that if you let go of the pack in front of you, you were lost. Period. You LITERALLY couldn't see the person in front of you. They wouldn't let us use our "moonbeams" because it "wasn't tactical." Like two hundred candidates stumbling around in the dark with 50 pounds of gear on our backs in the woods was tactical to begin with. But, as the days went on, my foot hurt worse and worse. I finished the washboard trail (last training exercise at the end of SULE II) because my Platoon Commander was leading the run (our group). He kept telling me the finish line was "just over the next hill." Well, there's probably 20 hills, and I broke it just after the second or third. There are puddles at the bottom of each hill (between 6 and 18 inches deep. I stepped in one and heard and felt the "crack." The Marine next to me claimed he heard it too. Anyway, I finished the run, and lo and behold, the NATO obstacle course was next. Well, the PC told me if I completed it, I would "complete" SULE II. So, I did. Then, there was the mile run to the "Follow Me" statue. I was hurting really bad, but I knew I didn't want to have to come back. I figured the more I completed, the better chance I had of staying. It worked out in the end.
The OCC program would suck. I was glad when my six week mark rolled around (Jr's and Sr's). It felt like I had been there forever, four more weeks would have been horid. Plus, I didn't have a good PT program going before I went. Needless to say I was pretty broken down when graduation came.
I split my head on the group run of the E-Course. A candidate fell in front of me and I jumped over him. When my foot came down it was into a rain rut. I fell forward and had my rifle slung cross body across my back. It slid forward and the front sight post split the back of my head open. My Sgt Instructor was flipping out! They were still running, I just jumped up and caught up to the group. I could feel the blood pouring out of the back of my head (you know how those head wounds bleed --- gushers). I ran up to the Sgt Instructor and said "Staff Sgt. I fell and think I hurt myself." He took one look at it, turned pale as a sheet, and started saying "Oh my God, Oh my God, are you OK?" I told him I was OK and wanted to continue so he told me if I felt faint or anything, to stop at one of the aide stations. Well, just up the hill was the big net you have to climb over and there were Corpsmen there. I went first so I could have the Corpsmen clean it up while the rest of the group climbed over it. He must have thought I was done with the run, so he took his time. When the rest of the group finished, we all took off running -- I was dragging the Corpsman along behind me while I ran with the group. He was trying to wrap a bandage around my head and I was trying not to get left behind -- it was pretty funny. I think I motivated everyone!
A buddy of mine had worse injuries than I did. He fell off an LRC obstacle and landed on his head, knocking himself unconscious on the concrete, then fell into the pool just below the obstacle. After spending like 3 days in the rack for that, he got Cellulitis. That was enough to send him home. He came back to Sr's the next year and was in my API class in November/December, now he's in my squadron.
I'll tell you, knowing that you'll have to come back and start over from day one if you get sent home is PLENTY of motivation to "suck it up" and finish. Just about everyone leaves OCS after graduation with some kind of injury. They tell you to let them know if you have an injury because it's easier to treat most in the early stages. But, if your injury is bad enough, you're going home. Most people don't want to take that chance. A Marine I know had stress fractures when he graduated from OCS. I ran into him at TBS and he was in Mike Company healing from them (several months later). You just have to make the decision as to what is most important to you. I wanted nothing more than to be a pilot in the Marine Corps. I knew that I didn't have much of a future in the civilian world, so I told myself I would die from exhaustion before I would give up. That attitude has helped me many times (like the long underwater swims at TBS and API, I told myself I would drown before I came up for air. I figure those instructors are well trained in resuscitation so I had a pretty good chance of coming out of it OK. If not, I wouldn't know anyway. But, it never quite came to that, thankfully!).
Oh yeah, back to the foot thing. I think it broke because of the boots I was wearing. I took my All-leathers and jungles with me to Sr's. Well, I had my wife mail me my Hi-techs. They are awesome for running because they feel more like tennis shoes (well, great for running on even terrain). But, the problem with those boots are the sole's are too soft and pliable. Those are what I wore for the SULE event. Humping around with all of that weight on rocks the size of golfballs and baseballs was just too much. My foot would nearly wrap around the dang rocks when I would step on them. I think TBS banned the Lt's from using them for that reason.