A team of international student volunteers posing for a portrait at the end of their sojourn in Costa Rica were joined by a surprise intruder: a sloth, who slow-bombed the picture at the last second.
I have some suspicion this could be a photoshop. There appears to be something wrong with the depth of field: the leaves are too sharp compared to the sloth, given the similar sharpness of the background (the persons) behind that.
More here…
http://www.chrisroubis.com/2012/03/is-this-the-cutest-photobomb-ever-or-just-good-photoshopping-moment-sloth-gatecrashed-jungle-holiday-snap-as-group-smiled-for-camera/