The Bristol City man will return to Swansea next Saturday with his new club knowing that he is guaranteed to get stick from the home crowd for that celebration in a 3-2 defeat for Yeovil.
Williams ran along the North Bank doing the ayatollah which enraged the home supporters although they had the last laugh with a late winner.
However, Williams says he has no regrets about his actions and told News of the World "I've played against Swansea a couple of times since that game and their fans have always given me stick.
"They've never forgiven me for doing the Ayatollah at the Vetch.
"I didn't plan to do it if I scored. It just happened it was one of those things.
"I suppose it was every Cardiff fan's dream to do the ayatollah in front of the North Bank.
"Looking back I dont regret doing it. I know it caused a lot of aggro on the day but I'm not sorry I did it."
