Today, I looked at the milk carton, and throught the expiration date was July 10. So I had to dump it out. Well...as I was crushing said carton, I looked at the experation date and it turns out that it said July 20...I had just thrown 1/4 of a carton of good milk down the drain.
The moral of the story? Check the experation date twice before you dump milk down the drain.