If you hear a train coming and there's no railroad nearby, it's probably time to head for the basement.
PROFANITY WARNING: This video includes frequent usage of the S, F, and D ("dude!") words.
Troubling footage continues to surface from the mile-wide twister that whacked Tuscaloosa, Ala., in April. Here's a home video that's notable not for scary glimpses of the gray monster but for the ominous audio that preceded it. The tornado lurks in the skyline at the beginning, spinning a hair-raising mobile of airborne debris, but gets closer and closer while it emits a locomotive roar that grows progressively more doom-inspiring. It's a fortunate thing that D.C.-area folks only see these things once in a blue moon.