Noooo! [he reached out and swatted the side of Venkman's head, frowning] I'm not kidding, Pete, this is serious. I finally find a situation where I could get legitimate readings about the effect this place has on the human psyche on a supernatural level, and it makes my equipment go on the fritz!

[he sighs, taking the helmet off and setting it aside in an empty chair. chewing on another bite of pizza, he mulls the situation over until he comes up with something that he thinks will work]

Lemme put it this way. You remember the thermal readings Spengs got on Louis, when he was possessed by Vinz Clortho. Think of how much of the big picture we would've missed, if we hadn't been able to see those readings. If we hadn't been able to figure out what was really happening in that thick melon of his.