Answer:
He finds a saw and saws his way out and he fakes his death by killing a pig and pretending it's his blood.
Step-by-step explanation:
Huck finds a "rusty saw" and painstakingly cuts a hole in the wall, covering it with a blanket to hide his handiwork. One day, Huck sees a canoe floating down the river. Huck hides the boat and fills it with food and other essentials.
Then, to give the impression that someone had broken in, he uses an axe to destroy the cabin door. Then he captures a wild pig, kills it, and takes it inside.
He uses the pig's blood as evidence to fabricate his own murder. That night, Huck paddles away in the canoe, knowing full well that they would assume he was dead in the morning.