Queen Em doesn't let me swim in the moat anymore. My favorite foods give me gas....usually a mixture of methane and hydrogen sulfide. Hydrogen sulfide at only 16ppm is deadly...and you can't smell it until it reaches 43ppm.
Hippos are far more dangerous than crocodiles. Saw a hippo break a crocs back. Quite shocking to watch...some people might have to take precautions before seeing such a sight.