To clear this up..
Sidious clearly speedblitzed the two of them before they could even react to what he was doing. The movie showed the same, abit differently sure but that is what happened....
Sidious had to distract Tiin so his ambush would have worked. But there are four there, why did Windu do nothing when Sidious jumped to them and killed two?
No, Kolar swayed
, he did make a move, but Windu did nothing.