I remember that too......The crowd went apeshit when Mongo McMichael turned on him and gave him the tombstone piledriver.
Honkey Tonk Man was such a flop as a face and booed so heavily that they had to turn it into an angle with HTM complaining about the fans lack of support, which led him to turn heel. I remember seeing his debut on TV, he wore these red pants with matching suspenders. The crowd killed him for the whole match.
Waylon Mercy got a lot of cheers gradually after his debut. Especially after he would put on that sleeper, let go when the ref called for the bell, and then he would kick the guy a few more times and shake the refs hand and smile afterwards. Awesome stuff, I still say that's my favorite gimmick of all time.