“This is your big surprise.”
(i) Where has this been said in the play?
This line is said by Gerrard in the play "The One-Act Play" by Douglas James. It occurs when Gerrard, after cleverly manipulating the intruder's actions and pretending to be a weak, unsuspecting victim, reveals to the intruder that he has been outwitted.
(ii) What is the surprise?
The surprise is that Gerrard, who the intruder thought was an easy target, turns out to be a clever and resourceful person. He tricks the intruder by revealing that he had been prepared for the situation all along, and the intruder's plan has been foiled. The real twist is the revelation of Gerrard's ability to handle the situation, which surprises the intruder.