I do this, too!!! My family thinks it is bizarre but I think it’s kind of cool. :) Mine is automatic, meaning I will just notice at some point that I have been writing a word – in cursive – with my right index finger only. Most of the time I am writing my signature out, but sometimes I notice I am writing a word I or someone around me said recently. I also write the word over and over until I notice what I am doing. My hand/finger is just down b6 my side, meaning it’s not like I am “air writing” on an “air blackboard” ;). It doesn’t happen as often as it used to…maybe once every six months or so now. I can also sense/hear other’s loved ones who have passed away – very much like that medium John something or other – but other than an occasional party trick I keep that pretty quiet for obvious reasons..and I found that when a disbeliever says “Yeah right, prove it…” the message I get for them makes them cry or look at me like I am a witch :/...anyway, I also see very cool deep cobalt blue pierces of light around me or others sometimes…SO I have always assumed my air writing meant I am, or have the potential to be, very spiritually evolved! :) See? It’s all how you look at it. Happy I am not the only one…just never thought to google it until now!