It happens to me sometimes, too, Punk. Choking can be one of the thrills on this ride. It can also be a dozen other things. When you come out of it, do you just go on, or is there any residual effect?
Does it happen when eating or drinking? It does with me, even just swallowing, I can choke. My experience has been that it happens most often when I'm upset about something. I don't have any substantial allergies, so there's no blaming that.