Jeff "Swampy" Marsh left a corporate job to pursue art. Three months later, he found himself learning animation by drawing backgrounds for a fledgling show in its second season called... The Simpsons. After trying for over ten years to get it on the air, he and his creative partner Dan Povenmire got their dream show on Disney, Phineas and Ferb. Spoiler alert, people liked it. A LOT.