You can imagine the scene, can't you. Round at The Smiths', viewing their slides from their trip to Solihull, to visit Mr Smith's cousin, and this appears. It send you over the edge. 3 hours of tedious slides, culminating in this : the epitome of dullness.
As you beat Bert Smith to a bloody pulp, you pause a moment to reflect : "Yes, it was work it. Bert deserved it." No court would convict you.
Bonus - Rather wonderful this, but after that slide, you deserve it.