Why did my cat just run full speed into a box and knock a bunch of stuff off of it

I’m Ruby。 I’m roughly 20 apples tall
ルビーです。背がりんごを20つぐらいです。
I drew my profile pic and banner. The gameplay in the banner is from dragon quest 1 for game boy that I recorded myself.
Why did my cat just run full speed into a box and knock a bunch of stuff off of it