in just under the wire

When people say "in just under the wire" means that someone did something at the last minute or moment, or something happened at last minute, for example:

" - I'm sorry , i didn't hear my alarm.

- So that's why you came in just under the wire? "

own spin on it

When you "put your own spin on something" , you give it your personality or you customize it.
for example

Teacher - Well students , for today's class we're going to bake cookies, the school will give you guys all the basic ingredients.

Student 1 - Ohh, i really love baking cookies, i'll put my own spin on it.

A spacey person

A spacey person acts distracted and sometimes a bit strange

Person 1 Hey bro look at there, it's Pedro

Person 2 Oh right!, but wait, what is he doing?

Peron 1 I don't know i think he's looking out the window , he's always been like this. a spacey person.