Had a very large one up in the high country above Yosemite NP invade a one-tent camp. Tore the place to shreds, while we watched. Banging pots and whatnot from 40ft away, it wasn't the least concerned with us. On another occasion, years earlier, had a big male (I think) tear into an early '70s "lead sled" vehicle. Tore a door right off the hinges, entered, emptied the big ice chest full of dogs and buns, and then skedaddled. All while we watched. Couldn't do a thing to shoo him away. Both knew they were in "safe spaces" in Yosemite, and that people somehow were constrained against going after them. It was open-season on campsites, though, from the bears' perspectives. Great place to grab lunch.