Deadly spider's egg sac being cut open is the stuff of nightmares

This viral video of a deadly spider's egg sac being cut open is the stuff of nightmares.

The footage shows the ravioli-like object being torn open with a pair of tweezers and a scalpel.

Then as the pouch opens, hundreds of funnel web spiders - each one a killer - burst out of the egg sac.

The chilling video was shared online by the Australian Reptile Park in Somersby, New South Wales.

The park released the vid to promote its new spider container - a room filled with 3,000 venomous funnel webs.

The wildlife sanctuary's head of spiders, Kane Christensen, said: "Our aim is to milk 3,000 funnel web spiders annually to send the raw venom we milk to Seqirus, who create the antivenom for hospitals around Australia.

'We're so excited to call this a step in a right direction and a true indication on how hard our keepers are working.'