haha that's great. I never noticed because I was always watching Egon rush forward to his mark to deliver his terribly acted line about the mug and balloons. Egon's terrible acting not Ramis
Also not really a reaction but after the Scoleris pop out when Ray says "Wow!", a sheet of paper blows right in Venkman's face and gets stuck there for a sec
I'm sure most have seen that though.
Another fun one, when Winston falls into the river. Ray and Egon's initial looks as well as when they look @ each other and know what they have to do.
Sorry! Another just came to mind. In the first movie when Venkman's says "We'll go to jail, peacefully, quietly, we'll enjoy it" Winston is behind him and has that look "well I don't know about that"
Jennifer is all laughs from Peter's comment until "You are a legitimate phenomenon." Big words confused her
Right before "GET HER", Peter takes one last look at Ray still not knowing where he's going with this or what's gonna happen.
Last one I promise! Right before Ray and Winston start singing the theme @ the party, Ray gives Winston that big ridiculous knowing look like "here we go!" Also I love the way after the woman says "Look who's here!" and everyone boos them, the comedic way Ray and Winston kind of shuffle in from the side. Just watch it and try not to laugh.