I'm sure the aircraft must have still been moving when the crew egressed. What two emergency vehicles did it run into? The drivers of the crash apparatus stay in their respective trucks and remain alert so that they can move out of the way or gain better positions to protect the crews on the ground, plus they shouldn't be THAT close to the emergency aircraft anyway (always leave yourself an egress route!). Typically, the emergency aircraft would be chocked as soon as it shuts down its engines, so someone dropped the ball big-time on this incident.
