To give you a reference, they’re somewhere between a snake and a mongoose ... and a panther.
I have witnessed this several times lately. I am not as fast as them, so I have decided to register for a child harness/leash thing. If your child is that fast in public, help preserve their life by using a leash. Or terrify them with tales of strangers murdering them so that they will not leave your side. Supporting documentation: http://weblog.xanga.com/