[Sookie has fallen into a pile of stuff for the rummage sale, and it proves difficult to get her out]
RORY: Jeez this stuff is like tribbles.
Tribbles are an alien species in the Star Trek universe, first appearing in the 1967 episode The Trouble with Tribbles. Tribbles are small, furry creatures with a purr that humans find relaxing, however they increase in such numbers that they eat all the grain stores on board ship, and Captain Kirk literally becomes buried in tribbles when he enters the hold they are in. In the same way, Sookie is quickly enfolded by the pile of donated goods.