Not to worry. African restrictions will not allow you to wander without a licensed guide unless you sneak out of camp. But, in the spirit of answering your question in the spirit you asked it, pray.
We watched a pack of hyenas take down a cape buffalo bull this spring. They surrounded him, at a measured distance of course, kept him agitated enough until finally one darted in from the rear and ripped his scrotum wide open. It was a slow process for the bull to bleed out, but they were patient and the bull provided the pack with a nice supper.
They are smart, agile and very very mean. If they determine you are on the menu, you don't have much chance if you're alone and unarmed.
I really miss my old computer. This one just doesn't have the capacity to download much or I could post pictures of that bull and his attackers.