Please human, tell me what's in the box!

My human's mom has a chihuahua, and my human's dad hates him, mostly because every morning he pees on the living room floor and the one who has to clean it is him and not her because she can't get due to her back problems, so every once in a while my human's dad gets some petty revenge like today!

I couldn't figure out how the chihuahua got in there and I was so curious about it by bouncing my nose into the box and running around, barking.

Of course he's not a bad person, after a couple of minutes in human time, he released him, but I can't deny those were two fun couple minutes.