A Cape buffalo can be "up and at 'em" for quite a while even with big holes through the center of its ciculatory system. I've seen them on their feet and ambulating at least as long after a good shot as that heart was pumping--and sometimes shooting them again just made them more ambulatory until they finally realized they should be dead.
Thanks John
FWIW I can't recall seeing any of our buffalo actually spurting arterial blood, but some that seemed less than immediately convinced by good shots into the area above the heart. Hence moving to spinal shots as a preference on them.
