David Letterman's "Top 10 Hubble Telescope Excuses” back then began with "The guy at Sears promised it would work fine," and included "Some kids on Earth must be fooling around with a garage door opener," "There's a little doohickey rubbing against the part that looks kind of like a cowboy hat" and "Ran out of quarters."The No. 1 excuse, according to Letterman's list, was that a "race of super-evolved galactic beings are screwing with us.”