when Kirk & Spock surprised Al Pacino
From imdb trivia
'Frankie and Johnny (1991) was being filmed in the same studio, and required Al Pacino to have a surprised expression on his face after opening a door. Director Garry Marshall arranged for Kirk (William Shatner) and Spock (Leonard Nimoy) be on the other side of the door that Pacino opened.'
but more fun info here https://i.pinimg.com/originals/ae/a9/f8/aea9f8f25b68bf945b6cdd8f973a462e.jpg
would've been cool had Pacino appeared in Trek VI