Say you come up with a truly insane photo lighting concept -- mount a small photographic umbrella to a hard-hat helmet along with a portable flash unit and presto! You have instant portable bounced flash: http://www.juergenspecht.com/truestories/?number=1&storypage=2
Is it nutty enough to be patentable? Unfortunately, there's prior art --- from 1932! See: http://blog.modernmechanix.com/2006/06/02/wear-a-flash-on-your-head/
This is a great little nugget of history. There's a nice little bit in the June Issue of PDN on hand-held umbrella construction also.