Moonspiracy

Morty looks at the moon through a telescope in the front yard when he notices something/someone standing in a mid-stride walking pose. He tells his family about the strange sight, but nobody believes him; they suggest that it was probably a smudge on the lens. The next day at school, he finds out that Mr. Lunas is a real person that came to work as a guidance counselor. Later on, Morty snaps pictures of Lunas, and tells Principal Vagina that he thinks the guy is "up to something" and "lives on the moon". Mr. Vagina mistakes him for a pedophile and confronts Lunas, ending with the former punching the latter in the face. As a result, Mr. Lunas commits suicide. A few days later at his funeral, it's revealed that Lunas was a Marine, and that "from a certain angle, some people would say he looked like a smudge." Morty runs home and sees that there is, in fact, a smudge on the lens.

Example of:
Unwitting Instigator of Doom