"Through the ages, I've seen Douchbagery take many forms. Kevin from "Ed, Edd, n' Eddy", Kevin from "Spongebob Squarepants". Today, It is Kevin from "Steven Universe"…"

I believe I recall an episode that began with the Eds in a hot air balloon (or something like that), and Kevin intentionally hits a baseball up at them to pop their balloon. I don't recall any real provocation on the Eds' part in that case.