Contrary to the name, shower thoughts aren't exclusive to showers. From long walks to mowing the lawn, many everyday activities seem to have the right circumstances to allow the brain to have these little aha moments.
Do you pick up the phone and call your grandmother without a second thought? Do you clean your room without waiting for it to first turn into an inhabitable toxic wasteland? Do you write all of your essays with plenty of time to spare? Then it sounds like Marvel might have found a new superhero, because very few people have the strength to resist the persuasive powers of procrastination.