[manish]

Was it only in my browser the train was going faster on the inclines than on declines?

[georgemcbay]

I think this is because (as samwillis pointed out) the rollercoaster is actually going backwards, so the inclines are really the declines and vice versa. Why they are running the animation backwards is another question, though.

[lwhi]

I thought the same. The animation does scale quite nicely though, which I found quite impressive.