New Super Luigi U: Sparkling Waters-3 -- Waterspout Sprint

This level involves running on water spouts. The spouts will turn off, but not so long that you'll fall off screen standing still. You can fall off screen if you're moving with bad timing. Go past the Goomrats, the strange-looking Goombas and you'll find the first Star Coin behind a giant Piranha plant. Either kill it with fireballs or hit it with something like a shell or a frozen enemy. Past the Red Coin Ring is the second Star Coin in a column of water topped with a Piranha Plant. Use a shell to get it or freeze the Piranha Plant. They'll break when the water spout hits them. The third Star Coin is over a Piranha Plant by the flagpole. Freeze that Piranha Plant to get it.