Now this is going to be a very medical post, but I was watching a patient get a release of their Dupytrens contracture today, which basically involved opening up the skin on the palm of the hand along the axis of the little finger, and chopping out the contracted fascial tissue, allowing the patient to flex and extend their finger normally again afterwards.
Now while the operation is in progress you can see all the flexor tendons for the little finger, which usually lie deep to the fascial sheet, and it struck me while I was watching things that it tendons are damn cool things. Given what they allow us to do they really are pretty underappreciated, and seeing them so clearly and so well on display was frankly cool.