"Peck" isn't really like airbending, actually. Soren showed me some of them while you an' Masaomi were talking, and that one was like -

[ HAND GESTURES. But, well, that's...sort of useless, so she glances inquiringly at Soren, who is more than happy to do something other than listen to all the talking.

...Peck is pretty self-explanatory, really, but wow isn't that cool man. ] ...Like that!