"Damn you, Benji," I said, "you did that out of spite, to break my date with Daisy, I bet."
He yawned. "I told you you'd better not touch it."
"Because you knew then I'd have to go ahead and do it. It's a wonder, with me knocked out, you didn't go try to steal my girl."
"I did. I am."
"You what?"
"I did go out with Daisy. I am with her now."
"Are you cracked? You are right here with me."
"True, but I am simultaneously with Daisy." He grinned reflectively. "And I don't mind saying Daisy is much better company than you.... Now wait, Bull. I know this is difficult for you to grasp, but it is a fact that I am in two places at the same time—only on different circuits. This is big, Bull, really big! After you help me with one or two details, I am going to share it with you. Listen to me."
Sometimes I can be sickeningly gullible. "All right. Start explaining."
"Think, Bull! Last night you saw me go out the front door. At substantially the same time, you also saw me, dressed quite differently, come down the hall stairs. It should be obvious. I have built a time machine."