"And so I went in to meet him, and he now just uses this [single] muscle beneath his cheek, and when he moves this muscle, [his computerized voice program] stops on one letter," Redmayne says of meeting Stephen Hawking. "So when you spend time with him, there are these long, long pauses. I was horrifically nervous, and I hate silence. And so basically I spent 45 minutes spewing out information about him, to him. It was really chronically disastrous."