When the tarantula rears up in a threat pose, which appendages increase the risk of immediate hair bombardment toward the keeper?

Answer

The pedipalps, as they are front-facing appendages during the threat display.

Because the pedipalps deploy hairs and are naturally closest to the keeper when the spider rears up, the risk of immediate hair bombardment toward the face or hands is arguably higher during this display than a bite.

When the tarantula rears up in a threat pose, which appendages increase the risk of immediate hair bombardment toward the keeper?
spidervenomarachnidtarantula