Slam

No matter how slow it is, it has twists that are worth a 9, and side twists appear in between, so it might be a bit confusing for 9-level users who aren't familiar with the concept of twisting. The jump sections with something in between are slow, but if they were even a bit faster, it would have been a factor in raising the difficulty. However, the fact that it's slow holds it back, making it exactly a 9—no more, no less.