Laughter

I know of several reasons why we laugh, some people laugh to cope with the hardships in there life. For example, a comedian who is overweight, may go on stage and joke about it. Some comedians have started it as a career to deal with their physical disabilities. Most of the time laughter happens because we find something ironic, or we may have made a big deal out of something a long time ago, and when we think back at it we see it from a different point of view which gives you a different opinion.
Sometimes it's important to laugh, and others it is not. It is important to laugh to socialize, if you do not laugh, you might give off the impression that you're like the Grinch or something, and you're serious all the time. Laughing is a great medicine, whenever you're bored, depressed, stressed, or anything laughing can help it greatly, and this has been psychologically proven. Making people laugh will make them feel more secure around you. Laughing makes friends, and is one of the main things people do when they have fun.
With enough respect to pastor Paul's opinion, I personally don't believe in "God". If there was though, I would imagine he would of made laughter because of the paragraph I just wrote, for all those reasons at least. You wouldn't want to go through life in a serious manner all the time, he would want us to enjoy life. I think that in heaven there would be a lot of laughing, since laughing makes people happy, and I'm sure he wants people to be happy, since he loves us and all.