. >> aaron strunk doesn't think twice.e jumps in after chris. >> as soon as i surfaced, i saw him floating there. >> he was like a bobber on a fishing line. >> chris' body quickly begins to sink beneath the surface. >> we thought he might have just been passed out at first. that's when we started seeing the blood emerge. that's when things got real serious. >> call 911! >> luckily one of the boats of onlookers happen to be a group of army medics from ft. hood. they immediately jump into action and swim toward chris. as the medics try and stabilize chris, his friends are panicked. they fear they may have just filmed their friend's death. >> call 911 right now! >> one of the first things that popped in my head was he could very easily be dead. he could have very easily broken his neck from the fall and could be dead. we might have just seen our friend die. >> chris handly makes it to the hospital. and after five hours of brain surgery, he emerges alive. >> had a subdural and epidural hematoma. you see both the outside and in