Humans are the only animals with the self awareness to see the dichotomy of our own existence and our mortality. This makes laughter very unique on our planet. On another topic only Humans and Otters eat more than one type of food in a sitting. Otters share there food. this leads to a variety of food being consumed ... just saying.
Professor Scott’s research has shown that your brain can tell the difference between real or staged laughter. When you hear staged, or deliberate, laughter, it prompts more activity in your brain’s anterior medial prefrontal cortex, which helps you understand other people’s emotions.
This suggests your brain automatically goes to work deciphering why someone is deliberately laughing.
The saying "laugh and the whole world laughs with you" is more than just an expression: laughter really is contagious. The sound of laughter triggers regions in the premotor cortical region of your brain, which is involved in moving your facial muscles to correspond with sound and prepare to join in.
I have seen a lot of very funny things on line but this video must be the craziest thing ever.....