Ms. Serrao wanted to remove the wriggling, chewing larva as soon as possible, but she also realized that the botfly in her head presented a unique opportunity for a nature photographer. As a result, she videotaped herself and the efforts by her surprisingly stoic husband, Greg Hiemenz, to remove the worm-like creature. A Vacation Bug That Keeps Biting. With, of course, video.
Bot flies are large, stout bodied, hairy flies that resemble bumblebees. But how they reproduce is what makes them interesting: 1) An egg-laden female botfly captures a night-flying female mosquito and glues her eggs on to it. 2) When the mosquito is released and bites a victim, the host's body heat triggers an egg to hatch. 3) It falls off and burrows in. Even more interesting is that sometimes, this happens on humans! [YouTube/NSFSqueamish] And on humans sometimes, this happens in the most inconvenient [pdf] of places.
Man pulls botfly larva from his own stomach. Previously, from head. From eye (Snopes, w/pictures). Wikipedia.