From "Doctor Who: Vengeance on Varos: Part One (#22.3)"
Governor, may I suggest you do something to please - to entertain, to please the people - just to give yourself time to recover your strength. Why not give them the life of the rebel Jondar? After all, it's his death or yours.
It would have to be something different.
I thought, perhaps, by laser obliteration, sir. By a concentrated build-up of power. Neutralize the cue-switch. That way, the random laser emitter builds up to a giant pulse of light - an explosion of focused laser energy that would wipe the prisoner out of existence.