I recently read an article that said people don't respond to the negative very well and that what you should do is speak about the positive effects of change. I guess that would equate to telling your friend how nice it would be if he were around to see his kids get married instead of telling him what the remnants of his head will look like if they were scattered about the asphalt. On the other hand, I'm a graduate of the School of Hard Knocks w/ a Doctorate in Life Lessons. I figure that if you sneak up on the dude and wack him about 3/4 strength on the back of his head with a rubber mallet, he may get a good idea of what a solid head bashing might feel like. So, my suggestion is to tell him how nice it would be to go to the wedding, and while he's contemplating the mental picture - WACK HIM!