Wide Open Spaces (1947 film)

Donald drives deeper into the woodland and finds a spot to sleep on an air mattress.

The springy branch of a nearby pine tree bothers Donald in his sleep and he is smacked back by it when he tries to shove it away.

However, as Donald sleeps, his exhalations cause the tree branch to lose hold of the pine's branch, causing it to hit the air mattress pump (with the hose still attached to the mattress valve) and wobble up and down with the handle, pumping fast and strong.

As the mattress deflates, it propels Donald all the way back to the Hold-Up Motel, landing right on the porch cot.

The short was released on December 11, 2007, on Walt Disney Treasures: The Chronological Donald, Volume Three: 1947-1950.