At the Little Fockers world premiere earlier this week, Vulture caught up with comedian Kevin Hart, who plays Ben Stiller's nursing colleague. So, Kevin, did you learn anything playing a nurse? "The one thing I learned was how to put a stethoscope on, and how to say the word, ‘stethoscope.’ I’ve never said it before. It took some time for me to get the enunciation down. But now I can say it. At the age of 31. It’s called a stethoscope." For more celebrity quotes, click through our Party Lines slideshow.