The first few Mickey Mouse and Silly Symphonies cartoons were animated almost entirely by Iwerks, including "Steamboat Willie", "The Skeleton Dance" and "The Haunted House". However, as Iwerks began to draw more and more cartoons on a daily basis, he chafed under Disney's dictatorial rule. Iwerks also felt he wasn't getting the credit he deserved for drawing all of Disney's successful cartoons. Eventually, Iwerks and Disney had a falling out; their friendship and working partnership were severed in January 1930. According to an unconfirmed account, a child approached Disney and Iwerks at a party and asked for a picture of Mickey to be drawn on a napkin, to which Disney handed the pen and paper to Iwerks and stated, "Draw it." Iwerks became furious and threw the pen and paper, storming out. Iwerks accepted a contract with Disney competitor Pat Powers to leave Disney and start an animation studio under his own name. His last "Mickey Mouse" cartoon was "The Cactus Kid". (Powers and Disney had an earlier falling-out over Disney's use of the Powers Cinephone sound-on-film system—actually copied by Powers from DeForest Phonofilm without credit—in early Disney cartoons.)