[SGCOS]

how long does a human brain head stay active when removed from the neck, i.e. guillotine, homicide vest...Whatever...

Did bag-daddee see the K-9 coming his way, or the U.S. soldiers coming?

[Boogieman]

Legend has it you remain conscious for about 3 seconds after a decapitation.

[JimRed]

...how long does a human brain head stay active when removed from the neck, i.e. guillotine, homicide vest...Whatever...

Even if the brain was "alive" after the blast, unconsciousness would have been immediate, I think.