Hehe, this reminds me of my first post asking bout my "curly"
Ceratogyrus then gave me a friendly nudge in the direction of the scientific names.

Well I do hope things pan out nicely for your friends B. vagans. Tis not fun seeing this sort of thing.

hiya,
a spiderling of mine also had something similar happen:
- the other guys have given great advice (esp Heteroscuderia); i would cool her down if i were you:
i find that they are much easier to work with and not so skittish!
my spiderling freaked out and almost pulled her leg off to get away, i left her then cooled her down
and then did the whole damp/ vaseline-ing the leg.
LOADS of humidity and warmth afterward
good luck