Two maniacs want to break out of the institution

Two maniacs want to break out of the institution. But for this you have to climb over 100 walls. So they start.

After 56 wall one asks the other: "Hey, buddy, you can not?"
The other one replied: "I think it will work!"

After 99 walls he asks again: "Well, buddy, you pack it yet?"

Says the puffing like a locomotive: "Now --- my --- power --- is --- over!"

Says the first: "Okay, let's return ..."