_special2 = Jetpack. Each use consumes some armor.
You'll take off in the direction your facing. Best if done in midair.

buildspecial2 or freeze = Freezethrower. Your target MUST be in your
crosshairs AND have both feet on the ground. The freeze range is short!
You have a limited amount of ammunition per life.

marker, mortar, and detmarker = Mortar Marker commands. See "ntf_help_mortar"

Touch an inert multigun to upgrade it to a Flamegun.