A figurative wall which the person has to smash head first through in order to learn something difficult. Used when a learning curve cannot be steep enough. esp. when the person doesn't know what they are in for.

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.

A learning experience where the fail that takes place in an attempt to achieve an objective is at a scale large enough to prevent another attempt of the said task even though the new information in hindsight would have ensured the success of the original task.