Narrative:

Aircraft took runway for takeoff roll 28L sfo-hnl. Captain centered aircraft, position and hold. Tower gave takeoff clearance. Captain gave aircraft to first officer, his leg. I thought brakes had been set. Did quick check around cockpit. Didn't notice brakes. Stepped on brakes to release. Brakes were not set. Airplane had started moving slightly 1-2 KTS. Unnoticeable outside. Aircraft stopped immediately and hard. Jolted everybody awake. Did quick check and continued takeoff roll with no further problems. Flight to hnl was normal. Briefed crew and told passenger what had occurred. Cause: lack of good communication/cockpit resource management between captain/first officer. Uneventful flight but scary situation because of abruptness of stop. Scared some passenger. Thought we had been hit or rolled over something. Possible factors: crew flying many night flts, red-eyes, body fatigue. Missed attention to minor details that could have caused more serious troubles.

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Original NASA ASRS Text

Title: AN ACR WDB CREW STARTLED ITS PAX WHEN THE TRANSFER OF CTL PRIOR TO TKOF CAUSED AN ABRUPT STOP ON THE RWY.

Narrative: ACFT TOOK RWY FOR TKOF ROLL 28L SFO-HNL. CAPT CTRED ACFT, POS AND HOLD. TWR GAVE TKOF CLRNC. CAPT GAVE ACFT TO FO, HIS LEG. I THOUGHT BRAKES HAD BEEN SET. DID QUICK CHK AROUND COCKPIT. DIDN'T NOTICE BRAKES. STEPPED ON BRAKES TO RELEASE. BRAKES WERE NOT SET. AIRPLANE HAD STARTED MOVING SLIGHTLY 1-2 KTS. UNNOTICEABLE OUTSIDE. ACFT STOPPED IMMEDIATELY AND HARD. JOLTED EVERYBODY AWAKE. DID QUICK CHK AND CONTINUED TKOF ROLL WITH NO FURTHER PROBS. FLT TO HNL WAS NORMAL. BRIEFED CREW AND TOLD PAX WHAT HAD OCCURRED. CAUSE: LACK OF GOOD COM/COCKPIT RESOURCE MGMNT BTWN CAPT/FO. UNEVENTFUL FLT BUT SCARY SIT BECAUSE OF ABRUPTNESS OF STOP. SCARED SOME PAX. THOUGHT WE HAD BEEN HIT OR ROLLED OVER SOMETHING. POSSIBLE FACTORS: CREW FLYING MANY NIGHT FLTS, RED-EYES, BODY FATIGUE. MISSED ATTN TO MINOR DETAILS THAT COULD HAVE CAUSED MORE SERIOUS TROUBLES.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.