[He smiles sheepishly.]

A friend had been blacksmithing downstairs, and was wearing a rather frightening mask. When she emerged out from the darkness toward me... well, the door to the downstairs is beside the toilet, and I had panicked and threw the heavy lid at her head and send her rolling down the stairs...

[He holds up his hands.]

She was fine, though! A shaken brain, but...

... They call it a concussion.