Δαφνη Ευτυχια Αρθουρος

YES! That sounds just like the thing I meant, thanks! Although,

the fallacy of "rubbernecking" that you hear about on traffic reports all the time.

*chuckle* You might, I don't listen to 'em ;) (see "not a driver" disclaimer above)

density waves travel backward and forward from an incident

*blink* Now that seems rather surprising! I wish you'd kept a copy even more now! :D