One of The Wolf of Wall Street's most memorable moments is, of course, its lengthy, lengthy quaalude scene.

However, despite being one of the greatest thespians of his age, it's a feat Leonardo DiCaprio couldn't accomplish entirely on his own; having never done drugs before, he enlisted the real Jordan Belfort to teach him exactly what it looks like.

"I showed him what it looks and feels like when you are high on quaaludes," Belfort told The New York Post. "I... started crawling around. We were both on the floor, drooling. His father walked into the room and asked us what the f*ck we were doing."

DiCaprio himself has corroborated the story, adding that he caught the sessions on tape, nicknamed "the lost Jordan tapes".

"He crawled around the floor to re-enact the stages of getting high. He wasn't the greatest actor, but he certainly gave me the inspiration," he told The Daily Mail in 2014.

The actors on Martin Scorsese's 2012 film took their (fake) drug-taking so seriously, in fact, that Jonah Hill ended up hospitalised after snorting too much fake cocaine. "If you ingest that much matter into your lungs you’ll get very sick, and we were literally doing fake coke for, like, seven months, every day," he revealed.

The Wolf of Wall Street MovieBites

In this case, the fake substance being used was vitamin D powder, which Hill claims did have some beneficial effects: "I never had more vitamin D in my entire life - I think I could have lifted a car over my head."