New Super Luigi U: Rock-Candy Mines-6 -- Spine Coaster Stowaways

The bone coaster is back and it's traveling over purple water. A giant Piranha Plant will drop down onto the bone coaster and go along for the ride unless you kill it.  The first Star Coin is above the bone coaster's path. The bone coaster will dive into the purple water, so be alert. There is a P-Switch that will make Silver Coins for you to collect. The second Star Coin is over some coins near the ceiling. After the second Star Coin, another giant Piranha Plant will drop onto the coaster, pinning you in a tight space. The bone coaster will dip into the purple water again, and you'll find the third Star Coin here. At the end, transfer to the yellow platform before the bone coaster falls into the purple water, then go to the flagpole.