How could air bending kill anyone?

Tornado
Take away breathing
Let آپ inhale not exhale and vice versa

...blow 'em off a cliff?

It's very simple.Airbenders could take the air out of your bodies and basically suffocate you.

I agree with the other people! Air is a very dangerous weapon. So only use it in emergencies! Lol!

make a really strong tornado

yes it can if آپ have a vortex یا somethin spinin around آپ and آپ try to breath, آپ can it sucks the air out of your lugs basicly so آپ cant breath its like when your dog sticks his out the window and he pops his head back in sometimes...thats so he can get air,the wind is blowing to hard in his face to breath in یا out ,and it depends on the اقدام آپ use and were آپ aim the attack.also what everyone else کہا

i agree with everything that was کہا here. most of the people think air the the weakest element because it works مزید on a defensive way. that's why this element is so underrated.
but when آپ think of the possibilities of being killed سے طرف کی an airbender, آپ will understand that air isn't weak, at all.
actually, i think air is the most powerfull and dynamic element. it's also my پسندیدہ =)
and while آگ کے, آگ is the most overrated element, i consider the weakest

maybe firing some needles یا spikes with air xD

it can push thm off درخت ,cliff,tower or
it can go soo fast آپ pass out :3

it would suckout the air

سے طرف کی lifting 500 feet in the air and slamming آپ to the ground.