Sheesh! Glad nobody was hurt and your truck wasn't damaged.
We had something like that happen to one of our F-16s while I was stationed in Germany. The pilot had landed after a mission, taxied back to his parking location, and did a "U-turn" in front of the HAS (hardened acft shelter) so the tow crew could hook up and back the jet into the shelter.
Well, about 5 minutes after he shut the engine down, a gust of wind caught the jet and it started sliding across the ramp!! It stopped when the wingtip (with a training missile loaded) slammed into the big steel HAS door!
That was 1 of 3 ice-related incidents within 24 hours over there. After the third one, our wing commander shut down flightline operations for a day.