"Those fucking lunatics managed to open a door to the Netherworld and The Collector is attacking the school. We have to stop it before it gets out of hand." Lydia explained. 

"H-He's real! You weren't lying!" Zach exclaimed in shock. "We thought you were-" 

"Schizophrenic? Nuts? Yeah, join the club." Lydia interrupted before looking at Beetlejuice. "Think you can handle him or will you need bait?" 

"Bait?!" Zach squeaked