I've posted about Peter Dunlap-Shohl's Parkinson's Disease blog before. Peter's work is a bridge helping people without PD understand what his world is like. And I'm sure people with PD appreciate that someone has captured their world and put it out there for all to see.
His most recent post is about falls. Here's a screenshot of part of one of the panels.
Click to enlarge and focus
It's Peter's genius to be able to use his cartooning skills to capture the frustration, but also talk about the physiology and physics of what's happening.