Many people commented me that the previous issue (No.3经验重要吗?) is difficult to understand. The following story may be much more direct (直接的), so that easy to understand.

Story 1: Where to sit down in a bus?
When I go abroad, I usually take an Airport Limousine Bus from 新百合ヶ丘 station adjacent my home; that is more convenient than taking trains with 2 transfers. When I get on the bus, I usually sit down somewhere around row 4 to 8 - aisle. Why?
Probably you saw pictures of many bus accidents to date. Some were severely damaged, but usually, the car between two axles (front and rear axles) remains so-so safe. The people sitting in front 2 to 3 rows were often dead, or severely injured.
Also, if another car clashes the bus from its side, the window side people are more in danger.
This is the reasons why I try to find a seat at aisle - row 4 thru 10.

Story 2. Seatbelt
If you once board on an airplane, you may be heard “restore the table and seat back to the original position, blah, blah.” Why?  You probably never heard the explanations.
If you recline the seat and meet a car accident, even the speed may be only 30 km/hour, the seatbelt (horizontal one) may choke your internal organs (it is so called “submarine effect” ) and you may be dead because of internal bleeding; If the seat back is standing, your hip bone will hold your weight so that much safer.  Therefore, if my wife or child at the navigator sheet likes to sleep and recline the sheet back, I usually say “release your seatbelt”. It is illegal and subject to fine in Japan, but better than to risk their life. Don’t you think so?

Story 3. Candle in your car
If you would drive a car in very cold country side, you may carry one piece of big candle in your car. If your car may be stuck in heavy snow and run out gasoline, no more heat is available. Light the candle and open the window a few millimeters. One candle saves your life from freezing.

Story 4. Bathrobe in a hotel room
When I stay at a hotel, I usually check whether a bathrobe is equipped. I also check the refrigerator and how many litters of water (even a juice is OK) is available. I often buy a big bottle of water just for the sake of safety. I also carry an activated charcoal type mask. Why?
Assume if a fire occurs at a few floors below your room floor. The water in toilet tank may be enough to wet the bathrobe. Put a large towel around your head and neck and make it wet by water. A set of army cotton globes is nice to have also. You can now run down the emergency stairs even you may see fire everywhere.
To go up the stairs does not necessarily secure your life.  At the roof of the building, you may realize that the ladder truck cannot reach higher than the 7th or 8th floor.
So, I may take the risk to run down the stairs, but with the above preparation.

Story 5. Non-drinkable water stock
At my house in Japan, in addition to 30L or so drinking water, we have an 80L p