A B727 PIC ABORTS THE TKOF WHEN CREW HEARS LOUD SCREAMS EMANATING FROM THE CABIN. PAX WERE CHEERING. THE ACFT HAD BEEN HELD ON THE GND AT DFW FOR 3 HRS DURING A TFC DELAY.

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DEPARTED THE DFW GATE AND FOUND OUT THAT THERE WAS A GND STOP TO ATLANTA. GND GAVE US A SPOT TO HOLD NEAR THE RWY. THE UPDATE TIME WAS IN ABOUT 20 MINS. THIS TURNED OUT TO BE ABOUT 3 HRS. THE FLT ATTENDANTS WERE DOING A GOOD JOB OF KEEPING THE PAX CONTENT EVEN THOUGH WE WERE NOT MAKING ANY PROGRESS TOWARDS OUR DEST. ONE PAX WAS BECOMING ANXIOUS AND CLAUSTROPHOBIC. THE CAPT INVITED HIM TO THE COCKPIT AND WE OPENED THE WINDOWS TO HELP CALM HIM DOWN. WE THEN GOT WORD THAT WE COULD START OUR ENGS AND GET READY FOR TKOF. WE HAD JUST RUN UP THE PWR AND STARTED OUR TKOF ROLL WHEN WE HEARD LOUD SCREAMING AND HOLLERING FROM THE BACK. WE WERE DOING LESS THAN 60 KTS AND DISCONTINUED THE TKOF ROLL AND ADVISED THE TWR THAT WE NEEDED TO GET OFF THE RWY. UPON EXITING WE CHKED WITH THE FLT ATTENDANTS TO SEE WHAT THE PROB WAS. APPARENTLY THE PAX WERE SO HAPPY TO BE TAKING OFF THEY ALL STARTED CHEERING. WE HAD NO WAY OF KNOWING THIS AT THE TIME OF COURSE. WE THEN WENT BACK AND GOT IN LINE FOR DEP AGAIN. THIS TIME THE TKOF ROLL WAS UNEVENTFUL AND WE PROCEEDED TO ATL. MOST OF THE PAX THOUGHT IT WAS HUMOROUS THAT WE WOULD STOP FOR THE NOISE BUT AS WE EXPLAINED WE HAD NO IDEA WHAT THE SERIOUSNESS OF THE PROB WAS OR COULD BE. JUST ANOTHER GLAMOROUS DAY IN AVIATION. GOOD WORK BY THE CAPT AND FLT ATTENDANTS IN KEEPING EVERYONE CONTENT DURING THIS LONG WORK DAY.