1. First Black Coin
Get the middle level of platform and then jump underneath the Surprise Question Block to get the first Black Coin.
2. Second Black Coin
Move forward until the middle level of the platform to get the second Black Coin.
3. Third Black Coin
After getting the second Black Coin, drop to the lower levels of platform and then jump underneath the Surprise Question Block to get the third Black Coin.
4. Fourth Black Coin
As you move forward, just take the lower platforms and run forward to get the fourth Black Coin which is floating on top of a gap.
5. Fifth Black Coin
Move forward and then run on the row of gray bricks that has a Surprise Question Block above it to get the fifth Black Coin.