Re: September 9 2004 strip - I've heard lots of things go "Hummmmmmmmm..." before. But not Ominously.
Pardon me for being so bold as to ask, but isn't "Ominous Hummmmmmmmmm" a registered sound effect of Sgt. Schlock's Plasma Cannon by Howard Tayler? http://www.schlockmercenary.com
(Hey, if you're going to borrow something /that/ obvious for parody purposes, at least toss him a thank you in the margins. )
--<< Bruce >>--