I feel like making a house you can burn down in Source. Make the whole thing out of about a million interlocking pieces, with 4 or 5 different versions of each overlapping, with only one active at a time, and it cycles through from ok to burnt with fire before breaking. The fire would spread, the house would burn, and the whole thing would slowly burn to the ground and collapse.
As I was walking down the stair,
I met a man who wasn't there.
He wasn't there again today.
I wish, I wish he'd go away.