Boy and Girl will have respective best friends, standing off in the background, making comedic asides about this thoroughly ridiculous situation between the two of them. This is commonly played by Judy Greer (and, of recent, Tyler Labine) in MOST romantic comedies but is also known as the Sarah Silverman/Adam Goldberg factor and, by law, requires one or both of these characters to be played by a second-stringer from a hit sitcom who is a favourite with TV audiences/a stand-up comic on the rise/someone from The Daily Show AND for said character to signal the start of Act II with a variation of the line Oh my God, youre totally falling for him/her/it!