One of the funniest moments in all of Lost so far. :D I literally fell out my chair. :
Out in the jungle, while trying to find Micheal, Jack and Kate trigger a trap set by the Others and get caught in a net. They eventually get out. Later, Sawyer remarks that it took them an awful long time to get back, jealous that Jack had spent that time with Kate, and implying that he thinks they were doing something else. Jack, of course, tells Sawyer that they got "caught in a net".
Sawyer replies, "What's that supposed to mean?"
Jack doesn't see what Sawyer's getting at. "We got caught in a net."
"... Is that what they're calling it these days?" Sawyer huffs.
Some time later, after Ana Lucia dies (Jack and Ana Lucia were in love), Sawyer confesses to Jack, in the most serious and unfitting voice...
"I screwed her. We got caught in a net," referring to the time when he and Ana Lucia had sex.
... Only later, when Kate explains what happened does Sawyer realize that he had it all wrong. *Insert LOLs here*