Yes, I actually found a glitch within the game Ace Combat Zero but i am unsure if anyone has found it before. It is within level 7 "Bastion" and to the north of the map. I posted on the mission's talk page and would be happy to discuss it sometime with you as well if you wish. Hope you have a nice day.
I saw the post you put on the page, about the AA gun, right? I will try to test it out sometime, and then confirm your facts. Personally, I think that whole level is creepy. There's the scary weather and dismal light, the creepy music, and now a 'ghost AA'.
Actually thereare two other "ghost" aa guns as well. They appear right before you fight the center, mountain base near the beginning of the level. Oddly I flew as fast as I could at them to try to destory them but my missles just passed through the one I shot at. Then they both vanished and anothe raa gun appears on top of a pillar. Reason why I am playing this level so much and so many times is because I am trying to maximize my kill scores per aircraft and also trying to fly all aircraft as all paint designs and use all weapons. Already put like...70 hours into the game which I am starting to think that if if one wants to do everything within the game, wll it takes a very long time and in my opinion it has to be one of the longest AC games made thus far. Playing my own songs while taking my time with it all as well, same song gets, old after a time, lol. Hope your day goes well. :).
Well anyway, gonna be a while before I complete everything I plan to get done within the game but hopefully it'll be finished soon so I may move onto other games and stuff. Let you know if anything else is spotted however.