Shaving with a ceramic knife (youtube video)

[serbrus]

I do not believe this has been posted, but if it has, apologies.
While surfing I found this video, of a man shaving his head and face with a ceramic knife.

http://www.youtube.com/watch?v=NjqnkcPIuCY

 

[JeffOlson]

I read somewhere that ceramic knives can be very sharp.