You get up and start walking away. You leave the building and Dr. Grey bursts out behind you and shouts "WAIT!"

You stop and hear what he has to say "Listen If you won't do that experiment... I have one more. Allow me to explain myself."

You will...

1Z: Show it to him (You can only do this action after receiving the drive from Dr. Grey in the Sileo branch)

1E: Listen to him.