Really? I can cry like a little kid when properly moved, but I've never been able to fake tears. Short of waving a slice of onion under my face, I have no idea how I'd go about it.

ETA that something else I found interesting was that it was after Valerie began to have emotions again that she started really sounding like House. She may have regained her ability to feel, on some level, but it sure didn't make her Little Miss Sunshine.