The Gist is awaiting the first presidential debate and preparing a rapid response for early Tuesday morning. In the meantime, we hear from Jeremy Epstein: Four years ago, he was a 20-year-old Hofstra University student facing uncertain job prospects. But after he asked Barack Obama and Mitt Romney about the economy during the first debate, he became briefly famous. He was even impersonated by Fred Armisen on Saturday Night Live. Now, Epstein walks us through what it’s like to ask a question on the debate stage, and if he thinks Lester Holt should pull a Candy Crowley.