The Lion and a little Mouse

one day in the jungle, there was a lion who having a nap. suddenly, a little mouse woke him up. the lion was annnoyed. so he picked up the little mouse and threatened to eat him up.
" please, spare my life, oh king of the jungle. if you do that, I will do something for you someday?" begged the mouse. "what, a little thing like you? ha..ha..ha.., this is really funny." the lion laughed. then he got the mouse free because he thought that the little creature is not delicious.
several days later when the lion was walking in the jungle, he got into a trap. he struggled hard but he could not free him self. when he was about to give up, the little mouse came. he gnawed at the ropes of the net and the he said," didn't you once laugh at me for being little? look, how I have saved your life today.