Appam Chuthiya(name made famous by Fakeiplplayer) hurled a few abuses to Hayden after the latter smashed him for 3 sixes in one over. Appam wanted to let him know that he had the last laugh. But the whole of India was laughing at him. Hayden didn't bother though, neither did Dhoni on the other side. Chennai won the match eventually by 12 runs. Maybe if Appam had given 2 less sixes away, his side might have won.
I was never a big fan of Sreesanth and felt his antics made him look like a fool. I wish someone calls Harbhajan and asks him to slap him again. Anyways here is the link of the article where Hayden stated that he frankly didn't think much Sreesanth as a bowler.