falconservice posted:The smoke from the mechanical refrigerator cars most likely is meant to represent the cold air inside and the hot air outside interacting, like what happens with frozen carbon dioxide or dry ice.
The high-volume model railroad stores might be taking $30 to $50 off of the catalog price of $199.99.
Andrew
MTH did something similar quite a while ago (10, maybe even 15 years ago? edit: darn, I'm getting old - 2001 for the first one, I think 
here's a link to a search on MTH to show a lot of them with this feature - they also had a figure pushing a load out the door to a ramp.)
The thing I vaguely recall about them was there was a pretty difficult angle to load the smoke fluid, I think. I think JT's Megasteam sells a little plastic bottle with an angled needle tip that helped.
-Dave
