An open handed slap/push to the faceguard with possible chin contact is all I see. The stupidest thing Seymour did was possibly risk a broken finger. Ben took a World Cup dive.
The rules are simple, if a player gets seen even trying to throw a punch they’re out, any smart player on the receiving end of that SHOULD dive like Greg Louganis just to maximize the chance that the ref sees it. But the penalty isn’t for the effect, it’s for the intent, the instant Seymour started swinging he broke the rule, which is an automatic ejection.