Greg Focker: And do you talk yet, Mr. Munchkinhead?[makes baby noises at Little Jack]Jack Byrnes: Greg, Greg, Greg. Dont infantilize him. Talk to him like an adult.Dina Byrnes: Muskrat.Jack Byrnes: Huh?Dina Byrnes: Muskrat, Jack.Jack Byrnes: Oh right.[to Greg]Jack Byrnes: Just try to understand, hes a little person. His communication skills arent verbal yet, but he understands.