Ex-'Bachelorette' Contestant Kasey Kahl -- Sucker-Punch Apology Is Hilariously BAD [VIDEO]

Kasey Kahl finally got a chance to put his TV skills from "The Bachelorette" to use again -- in a taped apology to the man and woman he decked outside a nightclub -- and his delivery is hysterical.

TMZ obtained a copy of the videotaped mea culpa Kahl agreed to make as part of a settlement in his civil lawsuit with the two people.

You gotta see Kasey's emotional (we're kidding) description of the attack, saying ... "He called me a douchebag, and I became upset. I sucker-punched (him)."

Honestly, we've seen porn stars deliver better lines.