The monitor displaying Jenny's current health status shows her heart rate jumping instantly from 80 to 160 as she is walking to the first part of the mission. This is similar to going from resting to vigorous exercise, but it can be seen during this scene that she is simply walking and calmly talking. In a later scene when she is being chased by hostiles, it appears to be back down to a double digit number.
In the first flashback in the Moscow disco, the flashing disco lights on the floor are white LED's, which were not available in 1984.