vega-ofthe-lyre:

In the DVD commentary, Carrie Fisher relates that during some of the London filming, she stayed a house rented from Eric Idle. Idle and the Pythons were filming Life of Brian at the time. One evening, Idle had a small party, including Harrison Ford and The Rolling Stones, and served a potent liquor (which the Pythons had been distributing to extras on their film, to help boost morale) that he referred to as “Tunisian Table Cleaner”. They stayed up most of the night drinking and having fun. The first scenes shot the next day were the arrival at Cloud City, which she says helps explain why she and Ford were so happy in those scenes. Idle is said to be pleased that he had a small hand in how the finished film turned out. (source)