Look, all we know is that last year the tiger started eating the keeper who was feeding him (just an accident the zoo said), and now the tiger was headed off toward the cafe.
Uhhhhh, the tiger got a hold of the keepers arm because they were dumb enough to stick it inside the tiger's enclosure while feeding. Even a prudent person knows not to mess with a housebroken dog while they are feeding....or do you?
As far as the "tiger heading toward the cafe" it bypassed several other animals it could have killed, but she was following the trail of blood left by the idiots who had taunted her.