I felt so sorry for Chuck after he met Lou. He was stuck! Suddenly, he realizes that pretending to date Sarah is very confining. I felt so bad for him when Sarah told him that none of it was real and that it would never go anywhere. I wasn't surprised to find out that Sarah was able to fight the truth serum and lie to Chuck about their relationship. I felt bad for her too, at the end, when she saw Chuck and Lou getting on so nicely together. She's kind of confined as well.
The whole thing with Tang was very funny!