Step 1: Get Water
Step 2: Fill Halfway
Fill it a little less than halfway
Step 3: Ninja!!
Place the ninja above water a DO NOT move him. Let him sink to the bottom
Step 4: Flying Ninja
Once he has sink fully hold red button and he will fly up
Step 5: P.s
This might not work on some phones and it might only work on normal ninjas. Caution it only works ONCE.