We noticed two YouTube videos, taken from an apartment with a view of Dean Street, documenting some late night construction activity at the Atlantic Yards site in downtown Brooklyn. How late? Well, one video takes place at 11:42PM (video) while the other is in the 4AM hour (above!). For reference, according to 311, construction hours are generally 7AM to 6PM on weekdays (there may be emergency work in the middle of the night, but......