Problem alread solved and cheaply "Within minutes of the triple-0 call being made to police about 9.45am on Monday, Parker had trained three cameras on the cafe, including one with a powerful 600-millimetre lens. It allowed him to capture extraordinary, harrowing images of the hostages whose simple trip to a Sydney cafe on a Monday morning had landed them in very real danger." (http://www.theherald.com.au/story/2770087/sydney-siege-harrowing-images-captured-by-channel-seven-cameraman-greg-parker/?cs=12) . So we can cross that one off the list of potetnial uses for a Jetpack.