To me the most impressive part is that he took the photos of the bear family with a 24-70 lens.
Btw: impressive photo series
I was also thinking: How fast can this guy run if necessary?
BTW: Two guys meet in the middle of the desert, one is carrying a telephone booth, the other carries a huge piece of rock. Asks the rock man: "Why do you carry a telephone booth?" amswer: "If a dangerous animal approaches, I will stand in it and do as if I am in conversation and the animal will pass on me...." and, after some consideration asks the rock man: "Why do you carry the rock?" reply: "That is easy: If a dangerous animal approaches I will trow away the rock so I can run faster"
Concening our camera wrecker friend I would guess he was carrying a telephone booth...