Colleague: Hey! This is not finished!
Me: Did you pull from the repo?
Colleague:
Me:
Colleague: Oh look, it's finished.

I had a similar moment.
Me: Okay, I committed my code, you can get it now.
Colleague: It's not there
Me:
Colleague:
Me and colleague: *push*

To be fair, we are using SVN and this is my very first commit to Git in the company so I forgot the push step...