New Super Mario Bros. Wii 8-5 QSC

The 2nd Star Coin is just past the midgate in between lava pillars. I threw a Bob-omb at it to get it, because the platform won't tilt far enough for you to get it. The 3rd Star Coin is near where the ravens show up. Just jump at the peak of the track and land on the platform when it switches tracks and beware the ravens.