Dear Sofia,
I once had the idea for a movie called "HEROES or how to recognice different kinds of lichen from quite far away". The plot is thus: there is a super-heroe, called "the Raven" (or something like that), not too young, and he meets a teenage girl, attacked by some rowdys. He saves her, and since she has no parents (or her parents are so disgusting that she doesn't want to return to them), he takes her with him. One or two years later, she wants to join him as a super-heroine: first he refuses (since it is a dangerous job), later he accepts her. Still later, she falls in love with another man, but finally, she realises that she loves the super heroe, and they get each other.
The movie is divided into different chapters, and each chapter is dedicated to one kind of lichen: the latin name of the specific lichen is the chapter heading. And this lichen always appears one time in the chapter: the camera leaves the actors, zooms on the lichen, a speaker says something about it, camera zooms out and goes back to the actors. In one chapter, the Raven is surrounded by some evil guys, he says: "hey, look there behind", we see the guys turn their heads, the camera focusses on what they see: a lichen, of course, the camera freezes, with an off-speaker telling something about it, next a turn back to the evil guys, they turn their heads back to where the Raven stood, but he used the time to disappear.
All should be as grotesque as possible, the head-quarter of the Raven, how he disguises, his different vehicles. Also, he shouldn't be that good looking: maybe even with a little potbelly. And the girl should have very estonishing hairs, in eye-hurting colors, and different every chapter.
Of course, this will be most probably for all times a head movie.

Yours,
John