Not knowing this word I had a look for the German version which is “Spontan” similar to spontaneous in English and then these two rabbits came to my mind. Was this spontaneous. I mentioned to the guy in charge of the animals that there might be little rabbits hopping around eventually. He was shocked and said that they were all female rabbits. I showed him my photo and he was a little astonished. Someone might have slipped a male one in, who knows – or perhaps they were just two friendly rabbits being extemporaneous.