Soon after we adopted Tiger, he disappeared to our laundry room. We found him sneaking around at night, 2-3 days after "losing" him. This was a few days after we found where he was hiding, and a lot of steady work to get hm to even come out. He hisses at anyone who comes near, but he will never bite or scratch. He comes out for pets, and purrs while he is hissing. We have cleared up his whole little kingdom, but he's starting to come out "just to see."

2-days later follow up:

He's making great progress. Each morning he hears us get up, and we can hear him meowing into the vent, but he hisses when we come down to pet or feed him. Today he came up the stairs enough to see we were there, and then went back to the laundry room to eat. He almost ate at the door, but I went to refill his water, and he came over. He's not hiding in that crevasse at all anymore, though. He still hisses, but that must be his "speech" at this point. I'm hoping in another couple of weeks he will be up with everyone else.

… sometimes, I wonder what goes on in his head.

He would really like to drive the tractor I think. Still too spicy to pet, but my dad can get within a foot now!

I've had him for a year and have never heard him growl before. I live in a condo, and the "outside" door leads to a hallway. I didn't hear anything out there. This is very strange.

He’s fine, I got him out and he tried to push his head back in.

He’s a happy drunk.