Smasher:
Joggin across the still-active runway isn't that fun, so you quicken the pace to a run. You survive across, and have managed to configure the PDA basicly. Could use a bit of more work, but you're at the hole in the fence.
While the runway is cut down to ensure that no pilot gets to feel the embrace of the jungle, the other side of the broken fence is a dark, odd-sounding place. There's nothing making noise in there that you can recognize.
The fence seems to have been torn down by something big as an elephant. The wires that hang there alone are also a bit bloody, making it seem that whatever tore down this fence, got hurt doing so.
Nethertheless, you could surely repair the fence. You'll just have to re-attach the wires to the pole in the middle, wich you'll havet o re-weld to it's base. But it seems like the middle pole is nowhere to be found on this side of the fence.
Maybe the animal dragged it a bit into the jungle? Well either you could take a look, or try to find a replacement.