Another Roger Rabbit fact. At the end of "Tummy Trouble", Roger's reaction to the Hospital bill is directly lifted from the 1952 Droopy cartoon "Droopy's Double Trouble"
@Gilition
@Zobieez
Mark Kausler worked on the stories for these shorts, he knew Tex personally and knows those cartoons like the back of his hand - I imagine he gave out the idea to stage Roger's take exactly like one of Tex's cartoons.