If you keep playing possum through this she gives you one last warning by licking the end of your nose, that is always the last thing she does - cleans where she is about to bite. She is 15 years old now and has been doing that since she was a little kitten.
I guess I can understand why she does it, it certainly gets the covers flying and me out of bed yelling in a hurry.
What mine lacks in subtlety, she makes up for in...enthusiasm.