It is unclear why Bonnie remarks that she wishes she were called "Vivian". However, exactly four days earlier, Pretty Woman (1990) had premiered. The title character was named "Vivian". It is unlikely that the WTB? production knew this and had time to write it in and film it, but the coincidence is too extreme to completely dismiss, here, and it might have been added at the last minute. Indeed, when later Sam is plucking flowers and ends up by saying "Don't go to Ridgemont!", she uttered it in the same fashion and with the same exact hand gestures and smart-aleck smile as Laura San Giacomo as Kit de Luca when she said "Cinderella", in response to Vivian, who had asked her for a name of someone to whom a happy ending happens.
First time Armin Shimerman and Alyssa Milano act together but reunite later in Charmed when Armin plays the Wizard.