The person who has seen every single episode of the hit TV show LOST sometimes can't even describe what is happening on the show to a person who never watches it. This is usually because they do not understand everything that has happened, even though they are experts.
A: "So let me get this right...You've seen all 4 seasons and you can tell me what happening."
B: "Ummmm. No. Sorry."
A: "You are so Lost on LOST."