I've never seen anything like this during the day, but have noticed from your site that others in my area observed something similar; just wanted to share what I experienced to help validate what was observed.
Location
Address
Allentown, PA
Latitude
40° 34' 29.74'' N (40.57°)
Longitude
75° 34' 46.85'' W (-75.58°)
Elevation
137.06m
Time and Duration
Local Date & Time
2012-11-21 07:15 EST
UT Date & Time
2012-11-21 12:15 UT
Duration
≈1.5s
Direction
Moving direction
From right to left
Descent Angle
270°
Moving
Facing azimuth
190.7°
First azimuth
182.35°
First elevation
66°
Last azimuth
195.39°
Last elevation
65°
Brightness and color
Stellar Magnitude
-5
Color
White
Concurrent Sound
Observation
No
Remarks
-
Delayed Sound
Observation
No
Remarks
__
Persistent train
Observation
Yes
Duration
1.5s
Length
7.5°
Remarks
It looked like someone had shot a flare or a firework; it was very bright white light, much like a firework.
Terminal flash
Observation
Yes
Remarks
At the end of my sighting it was as if the light burned out.