We have been gifted what can only be described as the greatest photobomb of 2016.

This horse's smile is actually just the Flehmen response.

Cool! Now we know to thank the Flehmen response for all these dope-ass horse photobombs.

🐴😄

This little girl did not know what was coming.
A beautiful Clydesdale horse gives a large, goofy smile unbeknownst to the little girl in front. Is this the greatest photobomb of 2016? Is this even ~technically~ a photobomb? Honestly, who cares. It's a great photo.
According to Wikipedia, a horse my curl its lips in order to facilitate "the transfer of pheromones and other scents into the vomeronasal organ located above the roof of the mouth via a duct which exits just behind the front teeth of the animal."