Based on the context and the answer, generate a question. 

Context: I walked out of my apartment door this evening to take Frankie on his last walk of the day . In the middle of the common driveway between my building and the identical one next door sat a little bunny rabbit . I stopped . Frankie bristled and grew still .

Answer:

He leapt towards and tried to bite the rabbit .



What did Frankie do after he saw the rabbit and bristled ?