Black Mamba Snake
The Black Mamba snake is considered the fastest snake among its kind as it can slither at 12.5 miler per hour. So, you certainly wouldn’t want to get trapped inside a house with one. But unlike other members of its species, the Black Mamba doesn’t hunt you down unless it feels like it’s in danger. If that happens, they’ll bite you repeatedly until you’re not a threat anymore. The combined neuro and cardiotoxins in the venom will kill you in 20 minutes if antivenom isn’t administered.