Near the end of the movie, after the rescue, the EM-50 crashes through the guard shack at the border. The two Czech guards jump up in surprise and one throws his coffee into the face of the other. If you watch closely you can see this happen twice.

Just before the crash, Sgt. Hulka is on top of the EM-50 and he yells "I'm getting too old for this sh*t" in a close-up. The scene then cuts to a wide shot of the remains of the guard shack as the EM-50 is approaching. The two guards are sitting in front of a truck unaware that the EM-50 is approaching. It then cuts to a closeup of the EM-50 crashing through the guard shack, and then immediately to the two guards jumping up in surprise with one throwing his coffee into the others face. It then cuts back to the original wide shot just after the EM-50 crashes through the shack. If you're quick you can see the two guards in the lower right of the screen jump up from their seated positions a second time & repeat the coffee throwing bit.

On the DVD this takes place approx. 25 seconds into scene 27. It's best viewing the widescreen version as the guards are partially cut out of the letterbox version.