I occasionally have a morning like that - on the MUP the normally-absent zombie dog walkers are out in force, the crazy college students (or maybe they're crazy college professors) are all out trying to run me down with their cars as I cross the UNM campus, and there's a ton of traffic on the usually-deserted road that takes me from campus the remaining couple of miles to work. Maybe it's the moon, or maybe it's just random coincidence - either way, it's usually not a long-lasting thing.