On Thursday night Donald Trump and Hillary Clinton met at the annual Al Smith charity dinner for a presidential tradition: roasting one another. While Trump managed to upset a room full of Catholics [1], Clinton made some uproarious jokes.

One in particular stood out. After the internet had a field day commenting on Trump's sniffle during the second debate [2], suggesting maybe he was taking drugs, Trump countered by implying Clinton was on drugs because she was so "pumped up" during the debate [3]. Before the third match-up [4], Trump proposed that he and Clinton take a drug test — which sounds more like a joke than serious request.

Clinton nailed what was so ridiculous about his suggestion with a memorable line. "Donald wanted me drug tested before last night's debate," Clinton cracked. "I am so flattered that Donald thought I used some sort of performance enhancer. Actually, I did — it's called preparation."

Hillary Clinton on debating Donald Trump: Yes, I used a performance enhancer. Preparation. #AlSmithDinner [5] pic.twitter.com/21XM8qQLBU [6]

— New York Times Video (@nytvideo) October 21, 2016 [7]

Clinton was indeed prepared for all three debates, easily maintaining her cool during Trump's attacks and serving him with burns [8].