Vibrating spider kills net casting spider

Description:

A tiny bodied pholcid spider with white humped abdomen and semi translucent legs has captured and paralysed a much larger male 'Ogre-faced' net casting spider (Deinopus subrufa).
In these shots it has (as usual) attacked a weak spot - a leg joint.

Habitat:

On a wall in an outer urban back yard.

Notes:

I have often seen these little spiders attack all sorts of formidable and much larger prey including red-back spiders. They always seem to go for a leg joint. This tactic might be appropriate if the mouth parts are tiny and the venom strong?
A day later the net caster was still whole but abdomen had collapsed flat.
https://bie.ala.org.au/species/urn:lsid:...