Actually you were lucky, because I did^^ The long jump made me cry a little bit (OK, a lot...) but I managed it
I am a stadium nascar player (and mapper, even if my maps are not on TM for various reasons), so I am used to maps that are easily repeated and do not contain this kind of bottlenecks. I play a little bit of canyon when I get bored (I like the drifts) and I suck at valley... To be precise, there was 5 maps that I could not finish (2 stadiums, 1 canyon, 2 valleys). But well, some of those maps got decent or even good grades thanks to awesome scenery and ideas ^^