A couple of videos from people with hands-on experience, and clearly know what they're talking about. The most comprehensive video apparently, but completely in Japanese. The auto translate is sketchy at best, but it conveys the general idea. Prevents cavitation and foaming of the damping fluid, so more stable at high speeds etc. Also has some good graphics, pics and animation. Official Videos Then there's that overconfident kid in class doing a book report thinking he knows everything there is to know about the book from everyone around, but has never actually opened the book. Absolutely no technical information in these two videos below; zero mentions of the actual mechanism or the cavitation advantage.