Hackers and Grosse Pointe Blank. Watched it almost every night to go to bed for years on VHS.

The client requested carrots but after delivery tells you they actually meant zucchini. You think it is strange to put zucchinis in a salad but still meticulously go through their dish and replace all carrots with zucchinis. Upon delivery they ask why it tastes weird and you realize they meant cucumber not zucchini and they got the two confused.