I know the feeling you're talking. Usually happens when playing shooter games and suddently I have an overkill or something similar.

In MK8, I really dislike toads turnpike. It's pretty dull, just being a figure of 8. You seem to have chosen my recommended setup for playing though. It'd be interesting seeing how we fair against one another. I personally don't climb the walls in Toads turnpike, Feel it is slower than hugging the inside gaurd rails.