Remember the dress?
I give you http://isitwhite.com/
I had an idea to make a stupid website that was just white, and links back to the topic on reddit.
I bought the domain, put the site up in about 15 minutes and watched in awe as people started pouring in. To date I’ve had 280k users.
It was even listed on http://www.theuselessweb.com/
If that isn’t a lesson in quick shots, I don’t know what is!