Narrator: In fact, Oscar had stayed with Lucille primarily to reconnect with Buster, whom he secretly believed to be his natural son.
Buster: Hey, Uncle. I feel so responsible for that.
Narrator: Oscar had gotten injured on a shoddy device George Sr. had invented when he forgot Buster was wearing a prosthetic hand.
[flashback:]
Oscar: Buster! The Cornballer! [grabs the cornballer and screams]
Buster: It's my father's fault!
Oscar: My fault? I was trying to keep you from burning yourself, you idiot! I mean, yes, yes. George Sr. sure rushed this to market.