The birth is kickstarted by a brick to the head, which is likely some kind of bold artistic statement and hopefully not a routine Australian procedure. Once the labor is over, the kids can actually go up and interact with the giant baby, forming the type of faint memory that will eventually produce behavior that baffles their court-mandated therapist.
Provided they don't just run into traffic right then and there.
The baby then feeds off of the giant, seemingly sentient, breast -- which also hoses the audience with projectile breast milk like a GWAR concert.
The show culminates in a glorious display of ... uh, we actually have no idea what the hell is happening here.
Beetlejuice On Ice?