[DeTomaso] Full Fuel Tank???

[Ken Green]

I'm wondering about the things attached to the top of the gas tank and maybe below the fuel level of a full tank. 
If the nozzle turns does not turn off until the tip of the nozzle senses gasoline, then the tube and hose from the fill point to the tank have to be full of gas?  I realize this is a dynamic, not static situation, so does the tube and hose start to fill when the gas tank is nearly full, and when the nozzle turns off, the gas settles into the tank and the tube and hose are empty and maybe gas is not even to the top of the tank?
I know these things have been around for decades and we don't see cars on fire every day, so it's hard to imagine that cars are diving around with rubber hoses leading from the fill point to the tank are full of gas immediately after filling?  

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   I'm wondering about the things attached to the top of the gas tank and
   maybe below the fuel level of a full tank.
   If the nozzle turns does not turn off until the tip of the nozzle
   senses gasoline, then the tube and hose from the fill point to the tank
   have to be full of gas?  I realize this is a dynamic, not static
   situation, so does the tube and hose start to fill when the gas tank is
   nearly full, and when the nozzle turns off, the gas settles into the
   tank and the tube and hose are empty and maybe gas is not even to the
   top of the tank?
   I know these things have been around for decades and we don't see cars
   on fire every day, so it's hard to imagine that cars are diving around
   with rubber hoses leading from the fill point to the tank are full of
   gas immediately after filling?