As Bigger tells his fabricated story about the previous evening to Mr. Dalton and Britten, what is he feeling?

During the questioning, Bigger lost his nervousness and became excited. He realized that no matter what he said, it was his word against Jan's.... and Jan was not only Jewish.... he was a communist.

There was another silence. They wanted him to draw the picture and he would draw it like he wanted it. He was trembling with excitement. In the past had they not always drawn the picture for him? He could tell them anything he wanted and what could they do about it? It was his word against Jan’s, and Jan was a Red.