Factual error: Chucky blows out the pilot light in Eddie Caputo's house and, mere minutes later, there's enough gas for a single gun blast to then cause the whole house to explode. 1) It would take hours and hours for enough gas to fill up that house to present a safety issue; 2) By that time, Eddie would have unmistakably smelled it; 3) A gun blast wouldn't be enough to ignite that gas anyway.
Factual error: The movie appears to take place in the winter but when Andy goes into his mom's room with breakfast at 6:30 in the morning it is light outside. At that time of the day it would still be dark outside.
Answer: When he jumps out, he screams a generic "Ahhh!" and then quickly shouts "Surprise!"
TedStixon