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We're big fans of flash art installations, especially when they're rugby-related. What could be better than waking up, looking out of your window and seeing an entirely unexpected artwork intended to get you hyped up for the Rugby World Cup?

Nothing, that's what.

The people of Cardiff were treated to just that sort of installation this morning - the "ball in the wall", essentially a great big Welsh rugby ball plonked onto the side of Cardiff Castle. Reactions were very positive, in the main.

Some were also very weird, however...

One guy immediately tried to create a budget version...

And then a load of others did some very, very surreal photoshopping. Like this...

And this...

And this...

And also this...

And then this...

And, penultimately, this...

We thought that would be the end of it. But it wasn't. Thank god it wasn't.

We now leave you with the best thing our eyes have ever seen. No words, guys. No words.