I don't even have or play playstation 3. I am just going off what every other ps3 player besides you has said. If you think you saw the beams then good, other ps3 players should be able to see them upon completing the ToB easter egg. Not saying I don't believe you, just find it hard to believe that you and your friends are the only PS3 players who have ever seen them.
I don't know guys, i have a funny feeling there's more to it for the Jet Gun and the building in the cornfield (Nacht der Untoten). The Jet gun falls apart, maybe the parts can be used for other stuff. Why would they let it fall apart then, whats the point. And every area has a reason, why is the buidling there? is it really just there so you can pick up parts for the nav Machine? I remember Spider's video where he talks about Reza's qoutes or interview or something, and says get familiar with the bus stops, Bus depot, Diner, Farm then he says the Cornfield that houses a hidden Lab. This is where i'm confused, is this the Labthe Power Room? if it is, then its not so hidden is it?
http://www.youtube.com/watch?v=C_gGJl-YOK8 this is the Video where spider talks about Reza's interview.