Aside from the countless reporters and bloggers who have tried unsuccessfully to quote various parts of the movie in their writing about this clip, my reaction is simple...
Seriously. This is what I've been waiting on. Not a full-fledged sequel but a modern-day glance at what became of Ferris Bueller.
Of course, that tiny bit of Oh Yeah got stuck in my head after watching the teaser clip a few dozen times. Then I couldn't quit thinking about this: