Soil pull mice

 Where soil pull mouse?
Teacher to the students told a story: There are three dogs chasing a mouse pull soil, soil pull a mouse got into the tree hole.
The holes in the trees is only one exit, can be a moment Surprisingly, tree holes drilled from a pig, pig going fast, and climbed another tree.
pig hiding in a tree, do not panic in the firm, fell off, smashing wait and see the positive upward halo? three dogs. Finally, the pig escaped.
finished, the teacher asked: climb a tree; there, a pig can not simultaneously knocked unconscious three dogs. Moreover, how can run too pig hunting dogs? else? problem, the teacher then said: Si Lula students to pursue the objectives dogs - a rat pulling soil.
because the pig suddenly, everyone's attention unknowingly played fork, pull soil even in the minds of mice disappeared.