In the video, the guy had visited Panama and was implanted with larvae by a Bot Fly. Nasty bastards. They have hatched, a birthing moment you won't soon forget! I have the video on my Medical Ink blog.
bot fly (Encyclopædia Britannica)
any member of several small insect families of the order Diptera. The adults are beelike in appearance, hairy but without bristles; the larvae are parasitic on mammals.