Can someone explain to me like I'm 5 how Devonta Smith made the Dagger look so easy?

On his long Super Bowl LIX touchdown, Smith looked like he was effortlessly gliding down the field while the defender behind him was flailing and struggling to keep up. How is this possible? Is it pure speed, running mechanics, or something else that makes elite receivers look so smooth? How does Smitty make it look so easy?