he is shocked

"What have you done to me!"

A logical reaction. You expected this.

"I have combined you with the essence of an animal." You casually explain to him.

"What ... why would you do that?"

You paced around the table, explaining your goals to him.

"The world has very few creatures in it, my dear. Every day, many species go extinct, but none are added to it. This is my way or repairing that error. With you, I have given nature a new species. One that is based on the human, the most successful species to date, and I have improved on it."

Your victim was shocked.

"You ... improved me?"

"Yes! With this new body you have enhances speed, greater stamina, improved hearing. You are better then you have ever been before."

You had thought he would rejoice, but instead he started crying.

"I did not want this, I never asked for it. Let me go." He pleaded.

"I am sorry, my dear. But I am afraid society is not ready to accept you yet."

"Why not?"

"There are simply too few of you at this point."

"Then change me back."

You shook your head. "The transformation is irreversible. You will be stuck in this form."

The man realized you were speaking the truth. His strength visibly left him.

"So ... am I going to remain strapped to this table then?"

"No, you can walk around if you like. As long as you don't leave this room, you should be safe."

With a wave of your hands, the straps unfastened themselves. The man quickly leapt from the table and ran to the other side of the room. Even to you his speed was unbelievable.

Like you warned him, he did not attempt to leave the room. He was probably too ashamed. Ashamed of his half bunny body, as well as ashamed of his nakedness. Even now, he tried to hide his groin.

You were happy, your experiment was a huge success. However now, you had a bunny-boy to deal with.