I've been rewatching Avatar and a question popped in mind. Do airbenders have any special sub-bending abilities? Spoilers for Avatar: TLA and Legend of Korra.

Water Benders can freeze water, Blood Blend, heal, and apparently block other peoples bending abilities (yeah, that's another thing. was it ever explained exactly how Amon could do that?)

Earth Benders can metal bend.

Fire Benders can lightning bend for some reason.

And I remember one of the other Avatars was show to bend lava, which I guess is some kind of mix of Fire and Earth bending.

And yet all throughout both series airbending isn't shown to have any kind of sub-bending skills. At least not one I remember seeing.

Anyone more familiar with the universe know if they just don't have one (yet)?