The Monster Squad (1987)

Continuity mistake: When Horace is confronted by the Gillman and has picked up the shotgun, he looks inside and sees E.J. and another kid hiding behind the counter. Horace begs them to let him in. E.J. and the other kid shake their heads no and lower themselves behind the counter. A few seconds later, a distant shot shows the two shaking their heads and lowering themselves behind the counter again.

SAZOO1975

Horace: Wolfman's got nards.

Trivia: When Dracula grabs Phoebe and she screams, that was a real reaction from her because she was afraid of him when he was in full make-up.

Question: At the beginning of the movie, it was stated that Van Helsing planned to use the amulet to send every monster to limbo but that him and his team blew it. How exactly did they blow it?