Lanefan
Victoria Rules
It was, only long enough ago that both the players and characters have forgotten about it - which is the point, when trying to serve revenge as a cold dish.That is too harsh. I can ambush you but I cannot simply decide that some totally hidden from you fiction that happens off screen leads without warning to a bullet in your brain. Remember, there's no 'to hit' in DW. A hard move like that will be serious damage or death. All that may be needed is Defy Danger, which is no more forgiving than an attack roll in D&D. However some logic for why this is a thing should have been surfaced to the players at some point.
The lack of a to-hit (or equivalent) roll is another issue entirely, as it IMO assumes the attacker is far too close to perfect in its ability to injure or kill every time.