First reason: Airplane crashes.
"The Turkish Airways flight crashed in Amsterdam last February, killing 9 people and injuring 121 others."
"Strangely enough, the sturdy unibody construction of his MacBook Air prevented it from being completely destroyed. It was still able to boot up and the hard drive wasn't toast. With some Apple Care love, it will be back on its unibody feet once again. It's good to mention that Baris' iPhone made it through the crash as well, without a scratch."