I dare say Sprocket has hit the nail on the end considering the aircraft landed at 5.15am EST, presumably one of the flights each week that has a dispensation to land between 0500 and 0600 local.
Although the Jepps do say "Pilots of aircraft (during the curfew period) must use the minimum reverse thurst necessary for the safe operation of the aircraft."
It then goes on to say that certain paperwork is to be lodged when greater than idle reverse is used, blah blah...
TL