You Die !
Not much. If you walk to the bottom of the earth, not much happens there, either. Gravity is slightly higher at the poles, but it is unnoticeable.
sometimes you float in the air a bit or walk a bit slowly
people does walk in spain.
they get arested
tourists walk around.
you turn into sand
You walk funny.
it eats you
you walk away
he will walk
Nothing happens. Until modern transportation was developed people walked everywhere. People in many countries still need to walk where they are going.