John Winger: C'mon, it's Czechoslovakia. We zip in, we pick 'em up, we zip right out again. We're not going to Moscow. It's Czechoslovakia. It's like going into Wisconsin.
Russell Ziskey: Well I got the shit kicked out of me in Wisconsin once. Forget it!
When Harold Ramis is fighting Bill Murray to try to keep him from leaving the base, notice when Harold is on top of Bill choking him, there is a duffel bag under Bill's head, and in the cut-aways the bag is a few feet away.
The "kitchen utensil" scene between Bill Murray and PJ Soles was completely improvised.