Heads up, Mad Skills Motocross for iOS players: We've just released a new track pack called Turbo Trouble 2! It's got 10 all-new tracks, and they're not easy. In fact, they're sort of strange, and mastering them will take some time. And of course it comes with the turbo-charged bike, which is always an adventure.
To buy it for only 99 cents (USD), just open Mad Skills Motocross (make sure you have the latest update), hit the Tracks button on the main menu, and hit Turbo Trouble 2.
Have fun, and good luck ... you're going to need it.