Did the cable slice off the tail rotor??
It looks like it was cut clean and happened in a split second after impact.
Looks to me like the rear end just fell off; structural failure caused by the excessive shaking of the fuselage (new gearbox mounts required). After the tail starts to fall off, both rotors are still whizzing around quite happily (for a short time). The TV 3 news video shows this clearly at 1:04: