Turning around is probably a good idea, you think to yourself. Eerie forests are no place for civilized men to be running into. A man is liable to get himself killed by going too far into unknown territory. You learned that in your training. Your training! You're supposed to be on a mission, you suddenly remember.
If you sprint back now, you can probably make it to the airport in time to catch your plane, and put this all behind you. Start anew with your mission and find out about those whale songs for Dimitr-
You hear a quick rustling through the bushes to your left, and see what looks like a brazenly white horse charge through between the trees and disappear into some tall shrubbery. You stand there for a second or two, stunned. Was your mind acting up because of some kind of post-trauma act? I mean, what kind of horse would be trampling around in the woods, especially one that was looking so purebred and white as the one you saw.
Your mind suddenly moves back to your childhood, to stories of unicorns that, when caught, grant a wish to the cather. Your grandmother used to tell them to you while you sat on her floor playing with sticks. If you caught the unicorn...
You snap out of it. It couldn't have possibly been a unicorn. But, then again... No, you have a mission. Or..

*go after the unicorn
*sprint over to the airport, it must be close