Originally posted by jigsaw
When I moved to AZ last year, one of the first things I did was get my CCW. For a while after that I had a friend that would lecture me about it every time he came over on how "guns kill people." He's so anti gun it's not funny. Finally after a month or so of going back and forth between his "world would be a better place" and my "who's going to watch the watcher" debates, I came up with an idea.
He walks in one night, saw something on TV that set him off (I think it was when the police officer shot the lady in the pharmacy drive through) and started in. I walked to my room, got my gun, dropped the clip out of it, sat the gun on the coffee table and started staring at it. After a few minutes when he paused from ranting to take a breath he finally asked what I was doing.
I asked if he was still firm in his "guns kill people stance", to which he replied yes. I grinned and told him I was waiting for the gun to jump off the coffee table and kill me.
He doesn't debate guns with me any more 
I'll bet he doesn't debate with you anymore, not with a gun on the table
For fun let's continue the story. Later after a few beers he mellows, eventually he eyes the gun and overcome with curiousity he asks to have a look at it, 'Sure' you say and show him the empty magazine which you now click home. 'It's not loaded'. He picks it up nervously, you laugh at his hesitancy. 'It won't kill you' You both laugh. You show him the safety and how to **** the hammer. 'Squeeze the trigger' you say 'It takes quite a pull. Hold it steady'. He points it at you, you frown and start to say 'Never point a gun at anyone unless.......'
There's a flash and you feel like someone punched you hard, you look down and see blood and look up to see his ashen face with a smoking gun in his hand. Then you remember you never checked the chamber....There must have been one round... in... oh sheeeit. 'How ironic' you think as you lapse into unconsciousness. 'I was right though... gun don't kill people....uurrgh'.
As they draw chalklines around your stiffening body, the cops lead your protesting friend away in handcuffs. Between sobs your wife tells them how she heard raised voices earlier before she went to the mall. 'I never thought this would happen'. She cries. 'I thought he was against guns. He deserves the death penalty' (Meanwhile she glances at the sofa and wonders vaguely how you get blood out of that material).
Implausible? Of course. Nothing like that ever happened
Edited as per Lazs correction although it could have been an old auto!:D
