Shamrock v Fujita = WTF??

Just caught this on Pride. What the hell happened? Why did Ken order his corner to throw in the towel in a fight he was winning?

Was there an injury or was Ken late for a body wax?

Ken starting having heart palpitations and thought he was having a heart attack. He was having one of the best fights of his career up till that point, but made his corner throw in the towel. It’s pretty weird to watch.

I heard he had an actual heart attack. Palpitations sound a little more reasonable.

Yes heart palpitations.
There was a rumor in Roppongi that Ken Shamrock was bragging he got 100,000 dollars for that fight.