Do you ever watch TV shows like "Planet Earth" or "Blue Planet" and just scratch your head wondering, h_ow the heck did they get that shot?_ Well, however they got it, it probably took a while to perfect, case in point, the "critter cam" shot. Critter cam is when you see from the perspective of an animal, and the only way to achieve it is by literally strapping a camera to a critter's back or head. In the video below, marine biologist Greg Marshall re-tells the story of the first time a crew from National Geographic attempted to rig a critter cam...on a live shark. And it ain't pretty. Next time you see this shot on TV, remember that bloody was shed perfecting it. Have a great weekend.