Keanu Reeves was injured during a friendly game of hockey with his friends during spare time. His lip was split, requiring six stitches. In his next scheduled scene, a love scene with Debra Messing, he was quoted as saying to her: "please don't hurt me."
The trivia item below may give away important plot points.
Screenwriter Robert Mark Kamen owns and operates a Sonoma vineyard. In need of a dramatic third act, Kamen asked himself what would be the most disastrous blow to his own winery. His answer: Fire. He was advised by a number of associates that vineyards don't burn. Less than a year after the movie release, Kamen's vineyard indeed did burn, destroying his studio home and 1/3 of the vines.