YOU SAID:
Grand Dad!......Fleentstones? Oof. Grand Dad. Grand Dad? WTF?! GRAND DAD?
INTO JAPANESE
お父さんおじいちゃん......おお。おじいちゃんお父さん? WTF?お父さん?
BACK INTO ENGLISH
Dad grandpa ... .... Oh. Grandpa's father? WTF? Dad?
INTO JAPANESE
お父さんおじいちゃん……ああ。おじいちゃんのお父さん? WTF?パパ?
BACK INTO ENGLISH
Dad grandpa ... ah. Grandpa's father? WTF? Dad?
INTO JAPANESE
お父さんおじいちゃん...ああ。おじいちゃんのお父さん? WTF?パパ?
BACK INTO ENGLISH
Dad grandpa ... ah. Grandpa's father? WTF? Dad?
That didn't even make that much sense in English.