"You wouldn't have seen that kind of alchemy before, sir. I don't know anyone else who can use it," Alphonse explained, before grinning a little at Roy's words. "The alchemy helps with that-"
However, right after that, he heard one of the tantrums Ed was famous for. Young or old, Ed was still Ed, and sensitive about his height. He glanced over to where his little-big brother was and just grinned at him. Looks like running to Roy had its perks after all. That made things easier on him. But first, finish talking to the colonel. "As I was saying before you so kindly helped me out, sir, you wouldn't have seen my alchemy before. I didn't know it was possible until I got here myself. I can transmute a small part of my soul into objects and control them, for a little while at least."
Speaking off, he cut the last lot of transmutations he'd done short and again felt that weird sensation as his soul came back together and joined up in one piece again. That felt really weird at times.