Someone just walked in to the room and declared "I have a headache and I don't know why." Their logical next assumption made was "It's a brain aneurysm." It probably isn't, but I started thinking about how we (humans) are so aware of all the different stuff that could happen to our bodies. An aneurysm is defined as a "localized, blood-filled ballon-like bulge in the wall of a blood vessel." This does not sound like something a living being would be so acutely aware of, and in that way we are very special. If you were not special and you had a brain aneurysm, you would pretty much just be dead. Your friends would cry and would then bury you. Morbid, I know.
But think of it as a blessing. If you were a coyote or some other vulgar form of life, you would have an aneurysm, die and, for about 10 minutes, your friends would debate whether to eat you or go look for something not-dead, after which time... they would eat you.