FORD: And you’d better be prepared for the jump into hyperspace. It’s unpleasantly like being drunk.

ARTHUR: Well what’s so unpleasant about being drunk?

FORD: You ask a glass of water.

Douglas Adams (1952-2001) English author, humourist, screenwriter

Hitchhiker’s Guide to the Galaxy, Phase 1, “Fit the 1st” (BBC Radio) (1978-03-08)
    (Source)

This was adapted into the novelization, The Hitchhiker's Guide to the Galaxy, ch. 6 (1979), in close to the same language:

"No, don't move," he added as Arthur began to uncurl himself, "you'd better be prepared for the jump into hyperspace. It's unpleasantly like being drunk."
"What's so unpleasant about being drunk?"
"You ask a glass of water."