(This one is serious, I swear)
I think I have seen at least two U.F.O.s and one ghost in my life so far.
When I was much younger (around ten or more years ago, when I'm still living at my old home), I saw a bright object with many coloured lights gliding sliently in the night sky above my apartment block. I didn't think too much about it then, but after getting to know about U.F.O.s, I suddenly realised that I might have seen one that night. Much more recently, I saw a U.F.O. a few years ago while returning home on the bus. The bus was exiting the expressway, on top of the bridge, and from that viewpoint, you can see the nearby suburb (we call them "new towns"). As I looked out of the window, I spoted an amber-coloured light above the skies of that new town (which, by the way, was the same new town in which I saw the first U.F.O.); I immediately exclaimed "What was that?!". As the bus got entered new town, I spotted a large object, with two spotlights and smaller flashing lights, above us. Another passenger spotted it too, but he didn't seem to take it too seriously. Later, after alighting from my bus waiting for my connecting bus back home, I spotted what appears to be the same amber-coloured liight flying across the skies slowly and disappearing.
As for ghosts, I think I saw one some years ago. The Chinese believe that on the seventh lunar month (according to the traditional Chinese calendar), the gates of hell are opened and all the ghost will be let free; during this time, several rituals and customs associated with the "festival" are performed and are observed. I was at one of these rituals with my mother, and I told her I was going for a little walk. I was half-walking-half-running along this path when I noticed something white brush past me; I thought it was a pole or something and didn't think too much. However, when I turned back and looked at where I thought the "pole" was supposed to be, there was nothing. Immediately I ran back to where the ritual was being performed, and stayed there until it was over.