studio in hollywood. johnny devenanzio: since 1914, universal studios has been an active movie lot. park. is it difficult sometimes to balance active movies that are being shot with people just touring around? and balance is a good word for it. there are times you have to detour around filming. you are responsible for the safety and the entertainment of the guests that will be using these seats. johnny devenanzio: i don't know. safety-- we might have to, uh-- we'll work on that. you might have to help me with that. [music playing] ladies and gentlemen, boys and girls, who is ready to learn about the history of universal studios hollywood? [cheering] because if you are, you've come to the wrong place. [music playing] now we're off and running. our first stop, the set of nbc's hit comedy, "superstore." you can touch and play with anything you want. no, no. johnny devenanzio: toys, groceries. johnny, johnny, it's the opposite. what's the fun of that? [music playing] come on, guys. everyone link hands. welcome to the superstore. now, guys, this actually is not real ice. it's, in fact, b