I learned that getting rather severe, like fifth or sixth, degree burns over half your face carries with it neither severe pain, discomfort, or even infection. And the suriving eye has no apparent ill effect.
Similarly, I learned that with much of the socket burned away, an eyeball won't fall out.
I also learned that you can build an underground lair, complete with a huge hydraulic elevator that would require additional foundational support, beneath an active dock and nobody will notice. They won't ever question why one canister in particular never moves from its spot.