the fire department and the helicopter rescue unit. he also calls the power company upriver and asks them to use their dam to lower the water level. within minutes, niagara firefighter gary carella arrives on the scene. >> where the victim was standing is almost impossible to fathom. it is one of the most dangerous positions that a person can put themselves in. if i was a betting man, i would bet 99.9 times out of 100, that no one could stand that close to the falls. >> carella, moriarty, and the rest of the rescue team meet to come up with a plan. they know there isn't much time. darkness is setting in, and it's only getting colder. >> our training and experience tells us we only have slight minutes to get him out of that position, or he may go into shock or even cardiac arrest due to hypothermia.