What is your worst drop in rating?

I have just dropped from 1400 to 1100 in blitz in the space of a week. What is your worst slump? 

1300 to 1050 in a few days

1300 to 1100

I once went down to around 2175 while drunk.

CMWillResignForBeer thanks for above. Please tell me how people qualify for CM title. I see all your ratings are in excess of 2000. However someone appeared today with a CM rating and all their ratings were well below 200.

Should said 2000

It happens to me once when I drank too much alcohol to oblivion and next day when I woke up, I was suprpised when I found out my ICC ratings has dropped from 1600 to 1250, and i don't remember playing boat loads of 3 minute chess when I was drunk.