I'll be in the garage. - A fancy way of saying you're going to be alone in the garage

A fancy way of saying you're going to be alone in the garage with your thoughts and maybe a bottle of wine and a very loud swear word.

I'll be in the garage. I'm going to drink wine and yell at my ex.

I'll be in the garage. I'm going to cry and then break something.

I'll be in the garage. I'm going to eat pizza and think about how life is a giant mess.