A viral video from Wroclaw Zoo in Poland shows a 13-kilogram Chinese muntjac deer playfully confronting a 1.7-tonne rhinoceros named Maruśka. The footage captures the small deer repeatedly approaching and lightly headbutting the rhino in a snowy enclosure. The rhino's reactions, including subtle movements and playful leaps, suggest the interaction was amicable rather than aggressive, amusing internet users worldwide.