While not backpacking but was in the woods I submit this:
I was sitting in a blind naturally formed by two fallen tress scouting a potential hunt location along a well used game trail. I had witnessed maybe 3-4 whitetails meander by and stop to pick through some acorns under a huge oak in the edge of my visibility. Just as they entered the brush I heard a loud bark and lots of thrashing........I quickly turn and see the deer bolting straight at me with two dogs chasing them. The noise was amazing. I ducked as a doe jumped right over the two trees I was hunkered down in. Luckily the dogs continued on after the deer. To me they were scarier than the deer, but I must admit looking at a deer from below was pretty unnerving even if it was just for a split second.