Loud Noise Heard On Roosevelt Island - Childish Prank Or Something Else?

Anybody hear a loud noise on Roosevelt Island yesterday? From the 4/20 -21 daily Roosevelt Island Public Safety Report:

Explosion/Investigation- A loud noise heard on the Island. PSD responded and conducted a search of the Island with negative results. All properties and buildings were in order.

Could it have been a childish prank like this?

You Tube Video Of Loudest Noise Not From Roosevelt Island

Or something else?

UPDATE 2:45 PM - RIOC Public Safety Director Keith Guerra adds:

The noise was heard and reported at approximately 4:50 in the morning. Nothing further to report.