I've narrowly escaped being stung by a scorpion by the simple expedient of dumping out my boots before I put them on... then screamed like a girl.
I've seen black bears, from a distance. One while I was in boy scouts, on a canoe trip into Boundary Waters. We got to sit in our canoes after having fished for dinner, and watched this black bear tear up our camp. He couldn't get at the food bags (suspended from trees), but he sure made a mess of everything at ground level.
I've heard cougars (had them come into town a couple times - yes, out here in flat old corn country!) but only once ever saw a wild one, and that was road kill. Couldn't believe what I was looking at beside the road one day, brought the work truck (all 45,000 pounds of it) to a halt and went back to see if that dead thing along the road was actually a cougar. It was. And the county sheriff that showed up about the same time I got to it confirmed it for me. One look at the claws and teeth was all I needed... that thing is a meat shredding machine. Or it might have been, if somebody's vehicle hadn't made it a meat-bag of mush.