Since we've been discussing developmental quirks lately (it's either that or Project Runway, which is totally taking a back seat to this season's ANTM even without the he/she) my friend Doyce told me about this crazy developmental hiccup thing the other day. At first I thought he was talking about metaphorical hiccups, but no:
Here's the thing with hiccups: little kids (up through like 2 years) grow SO FAST that their internal organs actually shift into slightly wrong places as they suddenly get more room. Hiccuping is the body's natural adjustment mechanism: all those little muscle spasms work all the interior squishy bits back to where they're supposed to be in the roomy new apartment of Baby.
So generally, hiccups = growth spurts, which = crazy appetite increase, possibly weird sleep (although honestly, from what I've read of your adventures, I don't know if you've ever gotten a 'normal' baseline to work from), and all the kinds of stuff that comes with a growth spurt. After the growing is done, there's around a month or so of him not being nearly as hungry and more attempts to figure out his body and such... and so it goes.
I have to say, right before the sleep regression the boy went through a hiccuping mania. Am I the last to know about this insanity?