Knock knock...who's there

I walked out of my room yesterday to see my housemate at the door shaking a mans hand and talking...

Who's that? I wondered... maybe it's someone from his family.

I hung out in the background, and then walked into the lounge room to to hear the gentleman at the door,
"I'd like to talk to you about spiritual things.."

Being a gentleman my housemate politely refused and sent the man on his way.

Since this moment I've been imagining ways to make this situation a whole lot more fun... does anyone have any ideas for the next hapless fellow to try the same dubious act of doorknocking.