Whatever hits the fan will not be evenly distributed. No matter how long or hard you shop for an item, after you've bought it, it will be on sale somewhere cheaper. Any tool dropped while repairing a car will roll underneath to the exact center. The repairman will never have seen a model quite like yours before. You will remember that you forgot to take out the trash when the garbage truck is two doors away.
Friends come and go, but enemies accumulate.
The light at the end of the tunnel is the headlamp of an oncoming train. Beauty is only skin deep, but ugly goes clear to the bone. The Government notifies you that your Social Security number has been revoked. Your personal computer threatens to tell all. As the moving van starts to unload next door, the first four items down the ramp are dirt bikes.