Originally Posted by StarfoxHowl
By "dead man's switch" you mean a secondary detonator, you may be right. Ali-baba has a tendency to put observers out away from their targets. Should the actual bomber not trigger the device, the observer can.
A remote can be wired in reverse so it detonates when it is released instead of when it's pushed. Constant pressure has to be applied to prevent detonation, the hand spasms after being shot or killed thus allowing the trigger to be released.