The Portal example makes no sense to me. I had always thought that the joke was that "you will be missed" could be interpreted as either "you will be free, and then I will miss you", or the more sinister "you will be **dead**, and then I will miss you".
The Portal example makes no sense to me. I had always thought that the joke was that "you will be missed" could be interpreted as either "you will be free, and then I will miss you", or the more sinister "you will be **dead**, and then I will miss you".