Also don't worry too much about the quality of the reply.  I mean, of course do your best, but not every reply is going to be a master piece.  Some will be good and some will be bad.  I just ask for at least try for a paragraph and honest effort.
Well you can have her open the door
Come up from behind him and tell him there's nobody in that house either
Grab the pizza and then try to run off with it
pass by the creepy house just as something scary, or funny was coming out
Anything goes.  Random would be better, but whatever works for you

Also thanks for the compliment :)