Earlier, I heard a THUMPA THUMPA car stereo go by, and from as near as my ears could tell the same direction, moving at the same rate (higher than the speed limit), a siren.
So I wondered which is more likely: a cop trying to pull over a speeder with a big-ass car stereo, or was it a cop with too-big subwoofers in his or her cruiser, groovin' on some tunes on the way to a call?
Alas, I couldn't see, so I have to guess.