No I didn't. The thing is a hippo could be playing and it would still crush you. If it flips in an enclosed area you have no chance. Why anyone would keep a wild animal as a pet is a mystery, even if it has been domesticated since birth. It's still a wild animal. It's not like a dog or cat which have been domesticated for thousands of years over generations.
But then again I have a problem with people who keep big or dangerous dogs around children, it's still an animal at the end of the day, and doesn't know that the child is playing when it pokes its finger in the animals eye or grabs its tail etc. I suppose if you love your pet you see that possibility as small enough to risk it.