I'm going to go with Weapons Officer hit the trigger a bit premature. They didn't hit the radar(?) Van (Exploded on the) ground in front, and they looked like were just S-8 rockets.
Also, I'm enjoying the breathless reporting of 13,000 Russian troops participating in the exercise. That's about a Division's worth. Back in the bad old days, during REFORGERs, we would have anywhere from six to nine+ US Divisions, plus at least two West German Divisions, a Brit or two, Dutch, Belgian, and every third year or so, the 4th Canadian Mech Brigade. Figure anywhere from 300,000-500,000+ troops roaming around the West German countryside all loaded for Bear. (Yes, everyone carried their basic load of "Warshots", just in case Ivan thought he'd be sneaky.)