Is the glass half full or half empty...or neither?

I have been sick the last couple of days so when I went to bed last night I placed a tall glass of water in a coca cola cup on the bottom shelf of the bookshelf next to my bed and then went to sleep. I was awoken during the night by the sound of something falling over. It was dark and I could not see, so I reached over and felt water on the bookshelf. I quickly turned on my lamp and saw that the glass of water had tipped over. Oddly, I was more curious of how the glass tipped over than of what was getting wet (there was a lot of water in the glass) since I was pretty sure I had not hit it because I would have noticed that. I grabbed a towel and started to soak up the water. Luckily the only things that got wet were some CD's and the blanket of my bed, which, in even more luck, absorbed most of the water keeping most of it off the floor. I cleared everything off the bookshelf and moved it to see how wet the floor was. It was slightly damp and I did the best I could to dry it but ultimately decided that it would just have to dry on it's own. This is where it gets interesting. I started contemplating my use of the term "lucky." It is peculiar to see how people define luck. I was lucky in that the water had not ruined anything and only just barely got on the floor due to the arrangement of my bed (a small futon mattress on the floor) and the bookshelf. Though how is waking up in the middle of the night while your sick only to have to clean up the water and move around your room to do it to be considered lucky? I guess it all comes down to whether or not you see the glass as half empty or half full. Although, in this situation it was neither. It was pretty much all the way empty. Maybe about 1/10 full. Or 9/10 empty, depending on how you look at it, but in current circumstances I would say neither is good. So, if all things happen for a reason than why the heck was I waking up in the middle of the night with a cold and cleaning up messes?