I was a teacher for thirty years and, luckily, never became infected by flying brains.

Present day brain matter disintegrates.... nothing left to fly around .. besides most of that got switched off years ago... and the world was so busy making money and oppressing the poor, we forgot to switch it back on.... Now the damned switch won't work anymore....

Flying brains. Haha! Funny. Anyway, hasn't there been something similar recently affecting sheep farmers? I think it was called lambing disease or something. The farmers get some mystery illness only during lambing season, I think. Weird.