The countdown of numbers on things in the background, from 50 down to 1, and once I saw it I couldn't unsee it or stop counting down with it. Numbers on beer bottles (like 36 on Marshall's father's beer bottle), on doors (like 1413 on Sandy Rivers door) of clothing (like 10 on Robin's jacket) or books (lots of books with numbers on the covers). Drove me nuts once I saw it and couldn't stop seeing it but I still thought this was an excellent episode, handling life as we all know it - a mixture of great, good, bad and worse.