Hey, Wellard called him sir at first. We have to be sure about things.

"Though I'd appreciate it if you don't practice everything I preach today. I like my eyes, and being able to walk. Which brings me to knees."

Duo mentions several more areas that are useful for taking someone down quick and hard. There are demonstrations. Both of them acquire a few bruises, but Duo is sure Wellard has picked up at least a few good tricks that will keep him and the girl safer.