Today, one of my BJJ classmates (a fellow blue belt) was showing me some entries for a drop seoi nage (sacrifice throw or shoulder/hip throw, I'm probably butchering the translation). He had been working on them with a friend of our professor's. He was struggling with one entry, where you cross your opponent's arms over your shoulder. I was like "let me try" and absolutely flung him. Then I did it in slow motion to show the mechanics, and how it's not just the leverage on the throw, but also the shoulder pressuring into the elbows to make the other person comply with the throw.
"You'll never guess where I learned that...Taekwondo class."