Upon closer inspection, he isn’t smiling at all, is he? In fact, his face is properly sinister, made up as it is by two curved lines and two square eyes. What is initially happy becomes properly creepy. When you add in this second image, my mind starts heading off in all kinds of crazy directions.
This guy is signaling the emergency exit in one of the lower levels of Le Forum des Halles in central Paris. In case of an emergency, there is NO WAY I’m going through that because it looks like on the other side, there’s “bum-bum-bum-buuuum, certain death!”
Also, this humanoid is child-sized and therefore exponentially scary.