When I hurt my back last year, I flew with a collapsible metal cane. It fits in the overhead compartment easily. I was disappointed that I wasn't offered any additional assistance at the airport or on the aircraft despite my shuffling gait and pained expression.

Earlier this year, I spotted Dr John the Night Tripper in a mens room in ATL. He had a carved wooden cane with beads and feathers (and possibly bird skulls) attached to the handle with leather thongs. Of course, a solid voodoo curse would allow him to travel anywhere he wanted with any weapon whatsoever.