After Venkman's big mouth gets the 'Busters arrested and their containment grid shut down, he turns it around by using his silver tongue to cut a deal with the mayor:
Venkman: If were wrong, then nothing happens! We go to jail, peacefully, quietly... We'll enjoy it! But if we're right, and we can stop this thing... Lenny: you will have saved the lives... of millions... of registered voters.
Peck: I don't believe you're seriously considering listening to these men.
Mayor: *gestures at Peck after a beat* ... Get him out of here.