What does need to be pointed out is that many (but not all) tarantula species (and there are a lot of species in different parts of the world) carry urticating hairs on the abdomen. These are hairs that the spider flicks up off its body into the face of a chasing predator. The hairs are fine and barbed and have a nasty habit of getting into eyes and nasal membranes and staying there. Thus, two things need to be stressed here.
Beware tarantulas with bald patches! (This isusually a good sign they have those barbed hairs and aren't afraid to use them!).
Offered by Phil.