Re: I know I'm late, but Cloverfield questions SPOILERS (duh)
Cutter John wrote:
Since the first time we saw them was when the creature was rubbing them off against a building, I'm guessing they were parasites. The exploding could've been the result of a desease they were carrying, or a chemical they were carrying to help them feed, like the anti-clotting agent carried in some animals saliva (vampire bats, mosquits, ticks, I forget which) that reacted badly with human biology.
FWIW, I recall one source that said this is indeed the case. They are parasites with an anti-coagulant designed to work on a host from a high-pressure, deep-sea environment. Thus this same chemical causes explosive hemorraging in biologically flimsy humans.
"The world is my country, science my religion." -Christiaan Huygens, 1682