It was a beautiful day yesterday, so I took an extra loop on bike ride home, heading into the sun, and wind, and pushing pretty hard, huffing a bit. Before I could react, right on a huge inhale, a good sized fly made it's way into my mouth, and so far as I could tell I inhaled it. Not swallowed (which I'd prefer, despite that being kind of gross), but inhaled into my lungs. I coughed and spasmed (didn't really feel it come out - not sure it went in), spit, etc. In the end I didn't feel any worse for the wear, so I continued. I feel some pain in my chest today, but I think it was just my hard workout, not a bug in my lungs.
The question is: is it even possible to inhale an insect that's not smaller than 2mm or something (I'm guessing this one was at least 3-4mm long)? If it is possible, or even for the smaller ones, is it a problem ... would there be anyway to extract it, if I needed too?