Go to Princess Peach's Target Test training session. Go to the platform under and near the target between the two walls at the right (indicated in the screenshot). Pull out a turnip. Jump and hold up, while moving right. When you're under that target, jump again so you are now in between the two sides. Press Z to drop your turnip and you will see that the turnip does not brake the target, but it actually goes through it.
Submitted by: Jesse