It appeared to be the moon but then I realized it was closer and that's when the flash happened. Thought it was a search Helicopter at first in trying to explain it.
Location
Address
Lyman, ME
Latitude
43° 25' 45.39'' N (43.429274°)
Longitude
70° 38' 17.34'' W (-70.638151°)
Elevation
64.397m
Time and Duration
Local Date & Time
2016-05-17 00:49 EDT
UT Date & Time
2016-05-17 04:49 UT
Duration
≈3.5s
Direction
Moving direction
From up right to down left
Descent Angle
243°
Moving
Facing azimuth
335.38°
First azimuth
335.24°
First elevation
38°
Last azimuth
303.38°
Last elevation
13°
Brightness and color
Stellar Magnitude
-20
Color
White
Concurrent Sound
Observation
Unknown
Remarks
-
Delayed Sound
Observation
Unknown
Remarks
-
Persistent train
Observation
Unknown
Duration
-
Length
-
Remarks
-
Terminal flash
Observation
Yes
Remarks
Thought the 'light' was the moon but in the wrong direction for that. Then it was bright like lightening but in a ball and the whole sky lit up. Next there was a 'ray/arc' downward.