The animal kingdom is full of mysteries, some of which are hilarious. This video isn't so much a mystery as it's just entertaining to watch. Onlookers were admiring a hippo as it came out of the water, only to be treated to flatulence on a grand scale. For all I know this is a fake video, but something is definitely going on with that mammoth animal. I’m sure it was a treat for the kids watching to go to school the next day and tell their friends that they saw a hippo rip a huge one.