Who makes you laugh?

I wanted to allow for people to share stories of those who make you laugh. This was spurred on by a friend of mine who always enjoyed making people laugh. I remember on countless occasions he had this go to joke when people weren't laughing, which caused for a little preperation on his part. He would actually wear pajama pants under his jeans so when ever he was not causing the extreme laughter he preferred he would drop his pants (no worries now he had pajama pants on) but this would always cause shock followed by complete laughter. Now what I want are your stories. Share them here as you think of those who make you laugh.