The six letter word

Begins with "I". Means "unhinged". INSANE.

That's what's going on. I realized that as I filled out the crossword puzzle someone left for me on the roof. The almost dead rat was a nice gesture. Didn't smell any poison on it. But who knows where that turkey leg's been. There was a fresh drop of machine oil on the roof. I smelled rabbit fur too, and...BAST! I KNOW that smell! Something chemical...medicinal. Like I was someplace that reeked of the stuff that I kept coming back to...

I know this is New Babbage. But I still don't know who I am. I feel like I've been here before when I wander the oldest part of town, but I sense a lot of stuff is wear it shouldn't be. I must be older than I look.

This knife I have, I don't remember where I got it. But it's got a strange symbol on it. It must mean something.

I found places were they serve free food to urchins. But I still enjoy hunting rats.

I found a big house made of glass filled with plants, it was very warm. It felt more familiar than the town outside. They had pictures on the walls of giant reptiles.

I stared at them. This one's is painted wrong. the scales should be redder. The meat on the flank tastes better...

For a moment I was jumping from a tree landing on something huge with a large stick...then I was back in the museum. I ran out of the building, grabbing someone else's umbrella from the stand on the way out. I sharpened the end into a spear. Never go anywhere without a spear. That I remember. Even in this jungle. The handle is good for pulling food out of traps too. You can even keep the rain off with it.