If you're not familiar with 'extreme skiing', you're not alone. I have seen some amazing things done on snowboards, but
Jonny Moseley Mad Trix was actually my first time to see anything remotely close on skis. That having been said, I've played a lot of 'extreme sports' games before and I find that
Mad Trix has the easiest 'grind' to pull off that I've ever encountered. Is that a good thing? Not necessarily. Yes, it is easy to pull off a grinding move, but it's ridiculously fake looking. You can be jumping over something completely perpendicular to it (jumping across it), but if you hit your 'grind' button, you are magically and unceremoniously 'sucked' onto whatever it is and begin grinding. Even if you're jumping alongside the rail, pushing your grind button can suck you over to it and start you grinding. Additionally, grinding is a continuous action, unaffected by gravity. Translation? It's possible to actually grind
up a mountain if you find a good pipe and jump across it while moving upwards (even slightly). Just sit back and enjoy your ride to the top. Another thing that strains the 'suspension of disbelief' is what happens if you go anywhere the game doesn't want you to. Try to grind on the fences along the outside of the slope (wouldn't you try it?) or attempts to jump onto or over a bridge over the slope area (why not?!) and 'POOF!' the game sets you back on the slope in the center - slightly before where you 'strayed' from the designated path. This comes off as fake and more than a little aggravating. The game can be fun at times, but I find it hard to get over glitches that are so blatantly against the very laws of physics.
That being said, there is a Ski School for training, Slopestyle mode where you compete for medals, etc. and Big Mountain mode for those lucky enough to do so well in Slopestyle mode that you get to make your own ski movie. In Big Mountain mode, you are dropped out of a helicopter onto a mountain and ski your way down.