What do rocket scientists compare very difficult tasks to?

A sub for the sort of micro-epiphanies that one usually experiences while daydreaming in the course of mundane tasks, such as showering, driving, doing chores, etc.

Rules:

1. The complete thought must be contained in the title.

2. No jokes or puns.

3. No politics or religion

4. If your post would be well suited to a different niche sub, such as /s/ideasforphuks, post it there.

5. Use good netiquette as laid out in RFC 1855