No human could withstand that kind of acceleration. But then, maybe the pilots aren't totally human. Been watching "Taken"?
FYI...
Lieut. Col. Don Diesel of the Air Force, who evaluates G-suit technology for the Air Expeditionary Force Battlelab at Mountain Home Air Force Base in Idaho, said G-suits combined with Combat Edge had proved highly effective in protecting pilots. But he said these pneumatic systems, with their valves, pumps and switches, added complexity and weight to the aircraft. "It would be good to have something simpler that worked as well or better," he said.
One such advance could be the Libelle suit, being developed by Life Support Systems, a Swiss company. The single-piece, full-body suit, which has been tested by the Swiss and German air forces and underwent United States Air Force trials this summer in Texas and California, uses long tubes filled with fluid to combat high-G acceleration forces.
Pilots testing the suit in centrifuges have withstood 12 G's of acceleration without a special breathing apparatus like a Combat Edge because the whole body is protected, he said. Subjects still use the anti-G breathing maneuver in high-G situations, he said, but it is not as stressful as with conventional anti-G suits and they can converse normally without positive pressure breathing interfering...Pilots also seem to be able to move their arms more easily in the Libelle and report much less fatigue after flights, Colonel Demitry said. "But the big thing is that pilots can talk at 8 or 9 G's, which is difficult when using a positive pressure breathing system," he said.