I had a great idea the other day. But I can’t remember what it was. Here’s how my thought process usually works (after my Adderall has worn off).

Oh, that’s a great idea! Lemme get a pen and paper…
(Searching for pen and paper)
Oh no! The thought is slipping away…far away…
(Finds pen and paper and frantically tries to get cap off of pen)

Must…write…down…thought…before…it….NOOOOOOOO!!
(Head goes “thud” on desk)
Why?! Why?! Why?!

(Okay, so that last bit was for dramatic effect, but you get the point.)