A mouse was walking? in the woods one day,and came upon a river.Needing to cross,he started to try and figure things out.Suddenly,a snake appeared."Can I help you,"inquired the snake."No thanks,besides,you are a snake,and everyone knows that snakes eat mice.""Not now,"answered the reptile,"besides,I've already eaten,and I won't be hungry for several days,so come on,just climb on my back,and I will carry you across,then you can continue your journey." "Are you sure?" "Yes,I'm sure." "O.k,"said the mouse. As they were halfway across,the snake turned his head,opened his mouth,in anticipation of lunch."Hey,wait a minute,protested the mouse,you promised." As he was about to close his mouth,on his lunch,he answered,"Did'nt you know I was a snake when you met me?"