One time in Yosemite, we made the mistake of not covering up the cooler in the back of the camper shell. An aggressive black bear decided to tear into the camper shell and raid the cooler. He ripped it up so bad we needed a new shell.
Another time at Yosemite we were out in the pines not far from the campground having a little luv-fun under the full moon. All of a sudden a black bear just appeared. Talk about coitus interruptus!!!! We got up and slowly sauntered back to the campground.