Strange goings on in MbZC

As I was being a lazy arse last night and couldn't be bothered to cook, I phoned out for Pizza Hut delivery (if you didn't know you could do that this far out, ask me and I'll tell you how! - you can also get KFC!!). As I was paying the delivery man (which was around 8.15pm) I heard a massive rumble, the sort of sound you might imagine coming from a large building collapsing. The front door totally rattled as did the windows. About 10 minutes later the same thing happened again. Now I'm no expert, but I'm thinking earthquake. They are not that uncommon in the region, especially in Iran which had a few last year. I was in Dubai last December when there was one. In fact I was in the Barclay's building right next to the Burj Dubai - so I'm in the basement of a building next to the tallest building in the world and we are told there is going to be an earthquake! Fortunately, there were just minor rumblings in Dubai. Maybe it's me, because I also experienced an earthquake in Japan a few years ago - but I would trust their buildings to survive more than here! Anyway, back to Abu Dhabi. Weirdly, when you search the Internet for all the earthquake notification sites, there is no sign of one anywhere near the region. There was also nothing in the papers today. Caz put a thread on the Abu Dhabi Women's forum about it, there were about 20 other people in Abu Dhabi who also reported the exact same experience. Now, I'm not sure if some just have over active imaginations but some have suggested that the airport had reported higher than normal flight activity at the same and others report a lot of helicopters in the sky. So what could it be? Military explosions they don't want us to know about? Bomb testing (at night?). Or maybe a small localised earthquake not big enough to register..... any other thoughts???