Darth Vader: A small rebel force has penetrated the shield and landed on Endor.
The Emperor: Yes, I know.
Darth Vader: My son is with them.
The Emperor: Are you sure?
Darth Vader: I have *felt* him, my master.
The Emperor: Strange that I have not. I wonder if your feelings on this matter are clear, Lord Vader.
Darth Vader: They are clear, my master.