A lurker (or otherwise uncredited person) sends this along, thank you! From
this site, which appears to collect such things and wrap them around porn banners, the text indicates that hyenas are
probably not going to attack live "prey" - as in, the other humans walking around - but that they do have the strongest jaws of any mammal. That factoid is offered with no checking, btw...
The baboons are another story, and it is not clear how common this kind of thing is - having nasty feral animals on chains as pets in the streets in Nigeria, but I personally have no interest in personally going and checking it out. I think they have convinced me I don't want to go. (Do you?)