This kid has been missing since 12/26 ? Two texts out to friends and then nothing afterwards ? Is that all the details we know ?
First of all, just because he was able to send out a text, or even a couple of them, doesn't mean he was necessarily in good health. I've had accidents on dirt bikes where I crashed and got back on the bike only to find out later that I had a sprained ankle and a broken collarbone. I had the same thing happen when I got thrown off a horse on the side of a mountain one time. I got back on him and rode 4 miles back to a barn, never realizing that my right ankle had been crushed when the horse stepped on it. A week later, I was leaving the hospital on crutches.
Point being, he may have sustained a really bad injury, but was still physically capable enough to send out a text to someone already programmed into his phone. The adrenaline alone may have been keeping him awake and functioning. You have a lot of that going on right after a really scary event. That's not to say that his hands weren't shaking and trembling a lot when he hit the "send" button.
He may have hurt a lot more than his foot, and chances are he did. No way to fix this other than to get out and hunt for him. It would have been nice if he had taken a loud whistle along with him, which is what experienced outdoors-men do...........but I doubt we are going to get that lucky. He's probably curled up under branches, leaves, and limbs in an effort to get a little protection from the wind and weather.