Jet suits are noting new. We have already seen plenty of them that let you fly. While they are fun to use, they can be a lifesaver in an emergency situation. As this video from Gravity Industries shows, the Gravity Jet Suit can be used to reduce critical care paramedic response time:
The casualty was reached in 70 seconds by the pilot whereupon blood flow, breathing, pain relief and other life critical support can be provided, buying time before the ground team arrive to execute an evacuation as necessary.