context: A newspaper announces the test flight of the world's biggest airplane. The plane lands at an airport, its giant wheel covering Bugs Bunny's hole. Bugs struggles out and, impressed by the plane, decides to take a look inside. Meanwhile, in town, Yosemite Sam robs the Last National Bank ("and keep reachin' for the ceilin'- till ya' reach it!!") then wipes off the assets, which read $4,562,321.08 (the amount he stole is equal to $40,654,968 today). He hears the police approach and drives off to the airport, with plans to hijack a plane and take refuge in another country where the cops can't find him.
  Inside the plane, Bugs has started to pretend he's a World War II pilot, and when Sam boards, he assumes Bugs is the pilot and orders him to take off at once. Before Bugs can protest, Sam threatens to shoot him. Bugs succeeds in finding the ignition button, and the plane sets off down the runway and flies over a busy traffic intersection.
  Racing toward a skyscraper, Bugs pulls the plane up into outer space, sending Sam falling to the plane's tail. When it seems as if the plane is about to crash into the Moon, Bugs steers the plane back down toward Earth, sending Sam falling to the plane's nose. As Sam threatens to have Bugs' license revoked, he discovers the rabbit reading a flying manual. Noticing the Earth growing larger in the window, Sam orders Bugs to read faster, or else. Bugs, however, refuses to read any further in the manual because of Sam's mean talk and orders him to apologize. Sam slaps himself in the head. The United States appears in the window; Sam apologizes to Bugs, but not without insulting him. Bugs then orders Sam to "say [he's] sorry with sugar on it." Sam refuses and tries to act nonchalant by playing with a yo-yo and a set of jacks. As a farm appears in the window, Sam finally gives in and apologizes properly.
  Bugs steers the plane straight back up to the sky and goes to radio the authorities to inform them that he's bringing the plane back. Sam then orders Bugs to give him the flying manual to keep him from heading back to town where the cops are after him, but Bugs throws it out the open door. Sam runs out to retrieve it, but upon discovering how high he is and "runs" back in. Bugs then lets Sam slip on a banana peel and out the other door. When he hears Sam knocking at the door, Bugs pretends to be a grocer. ("Sorry, can't use any today! [slams door on him] Try next Wednesday.") Burning with anger, Sam busts back in and threatens to blow Bugs to Kingdom Come. Since Sam happens to be standing on the bomb bay doors, Bugs pulls a cord and sends Sam falling out of the plane. Sam panics mid-air and scrambles back into the plane.
  Fed up with Bugs' flying, Sam orders Bugs to turn the controls over to him. Instead, Bugs breaks off the control column and tosses it out of the plane, causing the aircraft to descend. Afraid of crashing, Sam activates the robot pilot. The pilot comes out, assesses the situation, concludes it is hopeless, and takes one of the two parachutes from the parachute locker, and jumps out of the plane himself.
  With just one parachute left, Bugs decides he and Sam should draw straws to see who gets it. Sam suggests that Bugs should prepare the straws. While Bugs is distracted with the straws, Sam grabs the parachute and his bag of stolen money. Sam jumps out and, while shouting at Bugs ("So long, sucker! Ha-ha! Ha-ha! Ha-ha! Ha-ha... Wooooh...."), lands into a police car. Bugs manages to stop the plane in midair (just a few feet from the ground) by pulling a lever (an ending reminiscent of that of Falling Hare). He's just thankful the plane comes with "air brakes" (a play on a different type of "air brakes").
question: What was Bugs reading in the cockpit?
answer: Bugs was reading a flying manual.