This hidden switch is the gimmick by which the magician worked his trick. I knew how he did it! The gambler used a gimmick to rig the gambling games and won a lot of money.
A: He gave us an offer which is twice what we asked for. B: An offer this good must have a gimmick in it somewhere. There's gotta be a catch somewhere. We need to find it. Let's go through the contract again.
