Strap-on Aircraft
"The Martin Jetpack – literally a personal strap-on aircraft – is a two-litre jet-powered engine designed to soar across the skies at 100km/h at heights of up to 50 metres."
Sounds like a really loud weed whacker to me: http://www.news.com.au/travel/story/0,28318,25880890-5014090,00.html
And come on, aren't you just itching for the guys to let go? Say, I wonder what the view is like six-feet above the ground?