Alexander arnold explains his mbappe celebration after rare liverpool goal

I think there may be some confusion here!

Alexander-Arnold is a Liverpool player, not a Liverpool fan, and he wouldn't be celebrating a rare Liverpool goal. Additionally, he wouldn't be celebrating a goal scored by Kylian Mbappé, as Mbappé plays for Paris Saint-Germain, not Liverpool.

It's possible that you're thinking of a different scenario or a joke/meme that's been taken out of context. If you could provide more context or clarify what you're referring to, I'd be happy to try and help you out!