Not necessarily. It says "or can be spread out into the air
or the ground" And if I remember correctly, when Sasuke used it on Naruto and Sai, the ground wasn't affected at all

And weren't you in the process of using Chidori?

Type: Supplementary
Range: N/A
Chakra Cost: 15
Damage Points: N/A (30 if opponent is underneath the user's feet, even if below ground)
Description: The user will focus wind chakra to the bottom of their feet. They will then release the stored up chakra all at once. This will blast the user high into the air, and blast anything below the user's feet down. Doing this will enable the user to avoid the opponent's direct attacks.
~Can only be used by -Naruto Uzumaki-
Blasting the water below and around me down as I blast myself high into the air, and I land on...
Wind Style: Wind Bird (Fuuton: Kaze Tori)
Type: Supplementary
Rank: A
Range: Short/Mid/Long
Chakra Cost: 30
Damage Points: 60
Description: The user will manipulate the wind around him into a bird. The bird is not a summon; it is simply a manipulation of wind. The user can ride in the air on the back of this bird. It can also catch the user if they are falling from the sky due to it's amazing speed. The bird can attack the opponent by spitting out spheres of wind or by colliding into them directly.
~Once used, the bird will last until released by the user or destroyed by the opponent
~Can only be used 4 times per battle
~Can only be used by -Naruto Uzumaki-
My bird. O.O I remove a scroll from my back and use, while I'm on my bird high in the air...
Reverse Summoning Jutsu
Rank: C
Type: Supplementary
Range: All
Chakra Cost: 20
Damage Points: N/A
Description: The user will first take out a special scroll designed specifically for the art of summoning. They will open the scroll and slam their hand onto the already prepared seal within the scroll. After doing this, a clone, summoning creature, or human can be summoned from where ever they once were to the scroll. Since this is a form of summoning, it is a time/space technique. If the user summons a clone that is in Sage Mode, the Natural Energy that the clone had will instantly travel to the real body.
Note: Can only be used 3 times per battle
Note: Can only be used by Naruto characters that have been trained by Naruto.. or -Naruto Uzumaki-
And I slam my hand upon the scroll, summoning a Sage Mode clone next to me. At the same time I was using the summoning jutsu, my bird spits out a sphere of wind at you. O_O