I'd rule out meteors because the observation lasted several seconds. We do see meteors that last that long but they're essentially either tangential to the atmosphere (where no-one anywhere on the surface of the Earth is in the line of trajectory) or larger objects with deeper penetration (where the trajectory is affected by the atmosphere and no one will see it as a static point regardless of the orientation). Any meteor coming directly towards you probably won't be much more than a flash. I know that sightings like this are often put down to meteors but I can't see it myself. The chances of the average observer (as opposed to meteor obsesso) seeing one aren't vanishingly small, but very close to it! Do the maths!
Flare stars are unlikely unless it's a new type. These typically rise to maximum in a few minutes and subside in tens of minutes to hours. See here:
http://www.aavso.org/vsots_uvcet
I reckon the simplest explanation is the best one - a satellite flare or other reflection (from who knows what, something suspended under a weather balloon, etc). If the lat/long in your profile are correct, HeavensAbove didn't show any Iridium flares for your location at that time. Trouble is, people are such bad witnesses - I'm including myself in that too. We've had many bright transient 'stars' reported on IIS - "it didn't move". But often someone's been able to actually show which (moving) satellite it was. I'm worse, I see stars moving when they're patently not!!
As an experiment I've shown Iridium flares to people and asked them afterwards whether the light moved. Without exception the answer has been no. But it did move of course. The reason is that it outshines the neighbourhood and there's nothing to anchor it with. And on a Full Moon night there's even less. If the Iridium satellite was doing a close pass to the Moon or Sirius or Jupiter, the answer could have been different.
Anyway, nice report knightrider, you're obviously right on the ball to see something like this whatever it was, congratulations!
Cheers -