close the door slowly without saying anything
roger that ! better still "fire in the hole"
OK sam whats next:-)
I'd probably just roll my eyes and mutter "Jesus Christ".
Come in we are just sitting down to dinner, lets break bread!
Do you by some miracle do windows?
Ask if he needs some help in the here and now.
Quickly open his robe, look down below, and laugh uncontrollably.
"Oh, so you admitt your a dog?"