Watching the movie, Jurassic Park, even the first time I saw it, there's a glaring glitch when the characters Dr. Grant & Ian Malcolm, are waving the flare in the T-Rex scene.
There's a reflection of the flare, which I presumed was some kind of reflection on the green-screen.
However, when Malcolm is running, it not only stays the same distance (I'm guessing the actor is running away from a green screen?), and the reflection even passes in front of him - he is between the reflection-thing and the green screen.
You can see this occur at about 1:40 in the scene. This leads me to believe it was a camera lens error?
What caused this blur, reflection, or refraction, and why wasn't it corrected (it's a very visual error, setting it apart from other goofs)?