[Dutch Boy]

A beheading might release massive amounts of gas. He could be flying around the room like a balloon. pfffffffftttt

[evad]

He could be flying around the room like a balloon. pfffffffftttt

The Vladimir Harconan syndrome (Dune)...

know it well.

[TET1968]

"A beheading might release massive amounts of gas. He could be flying around the room like a balloon. pfffffffftttt"

You have a point...he would have to be secured to a concrete floor with some cheap S&M rigging......but that would still leave a possible flying head...hmmm.
Secure his ears to his belt buckle before you break out the dull knife...that's the answer.