reporter: the boys were in a single file line crossing a riverbed, and 17-year-old joshua berg was first in line and first to be mauled, and noah was next. the screaming i could hear from my friends and the growls from the bear which were loud and deep, and the screamings were heldless screaming and i can still hear it in my head. reporter: the grizzly pounced and clawed four of the teens before she retreated. just the chaos and the disbelief, and just, the confusion going on really was overwhelming to handle. reporter: the attack was roughly seven minutes long, but the rescue took over seven hours. the group was in the middle of nowhere. the aftermath and the way were scarier than the attack itself even though that seems like hard to fathom. reporter: with their emergency beacon calling for help, the teens used anything they could including garbage bags to slow the bleeding. working together as a team, they survived. the fact that we all made it
single file line crossing a riverbed, and 17-year-old joshua berg was first in line and first to be mauled, and noah was next. the screaming i could hear from my friends and the growls from the bear which were loud and deep, and the screamings were heldless screaming and i can still hear it in my head. reporter: the grizzly pounced and clawed four of the teens before she retreated. just the chaos and the disbelief, and just, the confusion going on really was overwhelming to handle. reporter: the attack was roughly seven minutes long, but the rescue took over seven hours. the group was in the middle of nowhere. the aftermath and the way were scarier than the attack itself even though that seems like hard to fathom. reporter: with their emergency beacon calling for help, the teens used anything they could including garbage bags to slow the bleeding. working together as a team, they survived. the fact that we all made it out alive is a testament to the