Meanest One-Two Punch?

Combo I pulled last night in a game, had a homebrew demon which could swallow an opponent, and also cast Confusion.

Confusion followed by Swallow is beastly. They need to attack you to get out, but they are also rolling to see whether they even can.

In a spelljammer game, I pulled an epic combo - first we told the pilot of our spelljammer to ram the opposing spelljammer, which was about the same size as us. Then I cast Reduce on the opposing spelljammer just before impact.

Had a BBEG lure the barbarian up some stairs, then use Bigbys Hand to punt him off them.