My dad shot one earlier this year from 15 yards and it did the mule kick. Had great blood and we started tracking it a couple hours after he shot it. We tracked this deer without looking hard for blood at all and found 3 large pools. After over 1000 yards of a great blood trail we lost the trail. I have never seen anything like it before at all. You just need to make the best decision possible and 9 times out of 10 backing out is the right decision.
Good Luck