Bucky had decided to take a run through the park instead of going to the gym that morning. He almost didn't want to leave Steve, part of him worried, part of him just wanting to take in all of the time he might be offered, but he also didn't want to smother him. So when Steve had gone off to t he med bay to work on some things, he'd decided to get some of his energy out.
He wasn't running particularly fast, more of a quick jog, but he'd been going for a while, his headphones in and blocking out the world a bit. He was in a good mood. He got to see Steve again, happy, and as healthy as possible.
It wasn't until he spotted someone sitting on a bench next to him after belting a loud chorus of Just the Way You Are that he realized he'd been singing along to the music coming from his headphones.
He slowed to a stop as he got to the bench, pushing his hair back, "Uh sorry, if I bothered you. Didn't realize anyone else was around." He still wasn't used to the place being so empty.