pat - I was traveling on a Macau-to-HK jetfoil, and the one in the picture is going at the opposite direction towards Macau. So, about 100MPH speed differential between us, and through the windows.
I work at Boeing and it's been a long time since we built hydrofoils like these. Interestingly, I was just talking about it with someone the other day. I didn't realize any were still in service.