The thing is that the butt bomb needs to be taken out before detonation, because otherwise the bomber’s body will absorb most of the blast.
See the attempted assassination of the Saudi prince in charge of counter-terrorism. He was 2m away from the bomb and survived.
....the butt bomb needs to be taken out before detonation.
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True, but not all that rare for people intent on killing themselves or into smuggling, from what I have read.
Czar Jennings surely must know more than either of us about the technique. /s sorta off and on