A Great Disturbance in the Force

OBI-WAN: "I felt a great disturbance in the Force, as if millions of voices suddenly cried out in terror and were suddenly silenced. I fear something terrible has happened."
...
LUKE: What's going on?

HAN: Our position is correct, except...no, Poor and Stupid!

LUKE: "What do you mean? Where is it? "

HAN: "Thats what I'm trying to tell you, kid. It ain't there."