I think [the first time I used TKTS] was Liz Swados' Runaways in 1978. I loved that thing. I became obsessed with it. It is an underrated, ground-breaking piece, paving the way for all of the teen-friendly Rent, Spring Awakening, American Idiot musicals we have today. That iconic sign meant that it was possible for high school kids with big dreams and little wallets to attend shows.