Random case

Sinus dissection:

This is a whole lot easier than it sounds. Basically, you get yourself a Striker saw and make a little box around the clinoid processes. Then go find a hammer and a chisel and pry out the block you just made. Once it's out, spend some time frowning at it and changing your mind about which sinuses are which.

The scary thing was worrying about accidentally sawing straight through the face (which, no matter how many times you look at it always seems to be way closer to the skull base than it actually is.)