This should be interesting. I post a sentence, then the next person adds one word (and ONLY one word) to the sentence (at the beginning, at the end, or anywhere in-between), and then the next person adds another word, and so on.
For example:
The dog barked.
The vicious dog barked.
The vicious dog barked loudly.
The vicious dog barked loudly again.
The brown, vicious dog barked loudly again.
etc.
So I'll start:
Cat on a mat.