When there’s only one match on the board that has a mana type I use, but if I take the match I can see that skulls will fall into position for the AI to match.
I decide that I’d rather miss out on 3 mana and dodge the skulls. So I match 3 of a color I don’t need, which the AI doesn’t need–waste my turn, basically, to avoid the skulls.
The dummy match I picked over the useful match then starts a cascade which drops skulls into place for the AI to match on the next turn.
I HATE THAT.