Last summer I was down at the NC coast and decided to take out the sea kayak early one morning when the wind was low and the sea was particularly flat. I spotted a shrimp boat about a quarter mile out and in the wake was a pod of porpoises. I paddled out there.
I got right up in the middle of the group and was paddling along thinking, "This is awesome!!" Then, as one of the 12 foot long creatures lazily surfaced and dived again within 4 feet of my little plastic boat, I thought, "These wild animals could kill me with less effort than it takes me to get off the couch and go grab a beer from the fridge."
I kept paddling with them for about 5 more minutes before heading back in with a nifty story to tell my wife and friends over breakfast.
My point? I don't know. I guess it's that wild animals are wild and just because they don't usually choose to kill us when they have the opportunity doesn't mean that they can't do it with casual ease.