Scott, the '68 Sebring race also had the Le Mans style start. The '69 Sebring race was the last one for the Le Mans start but it was not on the Trans-Am schedule that year. It was a popular thing to do in that era because of the added bit of flair or drama, but there were some obviously dangerous aspects to it so it was done away with. Jerry Titus' Mustang was rolled in practice the day before the race. The picture you posted is not from the actual day of the race.
Thanks Jon for the clarification, I should have read up on the race instead of just guessing about the accident.
As for the LeMans type start, didn't someone get killed in an early lap accident at Sebring because they started and pulled away before fully fastening their belts? I seem to remember that this was the final straw that led to the elimination of the LeMans type starts at Sebring for 1970.