FO OF AN MD11 TOOK EVASIVE ACTION AND CLBED IN RESPONSE TO A GPWS WARNING RESULTING IN A VERY HIGH ACFT PITCH ATTITUDE DUE TO THE FULL THROTTLE LIGHT ACFT CLB.

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I WAS THE PF ON A CARGO MD11 GOING INTO SUBIC; PHILIPPINES. AT 7000 FT MSL AS WE WERE APCHING SBA VOR; COMING FROM MANILA; WE WERE TOLD TO DSND TO 6000 FT. I SET THE ALT AND STARTED DOWN. WE THEN GOT A 1000 FT RADAR ALTIMETER AURAL WARNING BUT WE HAD NO ACTUAL RADAR ALTIMETER TO VERIFY THIS WITH; SO ASSUMED IT FALSE. WE SOMETIMES GET THESE AT CRUISE ALT SO NOTHING SEEMED TERRIBLY WRONG. THEN ABOUT 6800-6900 FT WE GOT A 'TOO LOW; TERRAIN' GPWS WARNING. I IMMEDIATELY FIREWALLED PWR; DISCONNECTED AUTOPLT/AUTOTHROTTLES AND CLBED. NOW WE GOT INTO ANOTHER SIT. I WAS TOO AGGRESSIVE ON A VERY LIGHT (300000 LBS) ACFT AND WE GOT PROBABLY 40 DEG NOSE HIGH AND THEN SOME L BANK. I RECOVERED FROM THIS MILDLY UNUSUAL ATTITUDE AND ACCOMPLISHED AN UNEVENTFUL LNDG AT SUBIC. THIS WAS PROBABLY A FALSE ALARM; BUT WE OBVIOUSLY HAD TO REACT. BUT MY REACTION; OR REALLY OVERREACTION; LEADS ME TO BELIEVE WE NEED SIMULATOR TWICE A YR. THERE IS LOTS OF TALK ABOUT GOING JUST ONCE A YR AND I HAVE ALWAYS BELIEVED THIS TO BE UNWISE. THIS EPISODE FURTHER CONFIRMS MY BELIEF. CONSTANT PRACTICE OF SITS IS NEEDED TO MAINTAIN SHARPNESS AND SAFETY.