I'll be in the garage.
I'll be in the garage is a reference to the show "Rick and Morty where rick and his lover call it off. He gets home and tells his family how life is meaningless and says I'll be in the garage, where he has a attempt of suicide.
Jake: Are you okay dude? That break up was pretty harsh.
Gage: Yeah I'm fine, I'll be in the garage.
Gage: Yeah I'm fine, I'll be in the garage.
I'll be in the garage
Slang for planning to commit suicide
Later bob, I'll be in the garage.