I honestly love this gif of Remus so much because he’s just SO DONE with Sirius. He goes from being “Sirius, you have a wand to your throat. Now is not the time to start getting sassy and insult the person holding said wand” to “you know what, screw it. Do whatever the heck you want. I’m done. Why do I even bother with this crap?” And you just KNOW that this exact same situation happened regularly while they were at school together.
THIS. THIS is why I hate Snape so much. Everyone says he's such a tragic hero, but he's NOT. He's a bully, and instead of taking kids under his wing, because he KNOWS what it's like to be bullied, he bullies them more than anyone else. Snape is not a tragic hero. A tragic person, sure. But Snape was never a hero. And Remus Lupin was. Every day.