It is so simple... because it's a curious scene with too many questions, it is not a common thing. First, when we didn't know too much information like we do now (for those who are following the manga like me) we were wandering: "What's that tube??", "Why is Syaoran and Sakura there?", "Why are they separated!?", "Why does the manga and the anime begin with that?" and "What does it mean??". Thankfully, we know part of the meaning, we can sort of understand why they are in that strange tube and what is that tube. Then, we are extremely excited to see that scene again with the knowledge we needed before!!! because we could never answer our angst for seeing them wanting to be together showing too much pain, what is Syaoran going to do? Will he be able to break that crystal barrier? perhaps it is a time barrier, I presume? we still don't know but the desire of knowing everything that has to relate with that tube is the reason we are always waiting for the begging scene calling it the famous tube scene.
Chapter 183, we're waiting for you!!!
