I was at my first real software job and we had an in-house system to provide automated installers for common open-source applications for our end-users. After I started getting familiar with it I had a dream one night that certain input fields (which were very common) could be rather easily exploited to inject shell commands with root access. I woke up convinced that it was a real bug, went to work the next day, and…
When I was young, I dreamt that I was playing guitar and made up a cool song. When I woke up I was so excited, that's something you would hear an old rockstar say about their best song, right? "Came to me in a dream". I jumped out of bed, grabbed the guitar, and started playing the song, every note still clear in my memory. It was a completely random series of notes.
Here's the pearl of wisdom I captured for posterity:
"Emotions — it's emotions that invented and fricasseed the invisible ravioli."
(I still have the card.)