A while back in a post called "Unintelligent Design" I mentioned the recurrent Laryngeal nerve, and how it starts at the brain, travels down to the heart, loops around an artery, then makes its way back up to the larynx. For all that are interested, the video I'm about to link to shows a dissection of this nerve in a giraffe, which has a very long neck, and hence a very long detour to go a very short distance.
If you do not like looking at dead animals or blood, do not watch this video.
EDIT: The entire documentary this clip has been taken from is watchable on YouTube. If you are at all interested in the anatomy of Giraffes, that watching THIS video will be very informative indeed.