It's going to a great finish. If WI can get a lead of over 200 then SA will not go for a win and the match will end in a draw.
It was a poor shot by Lara but I can understand what he was trying to do. Thats the way he plays. He knew it was a risky shot and after seeing how Boje was getting a lot of spin he was probably trying to hit him off his line and force Smith to change the bowler. I read an article recently on how Lara, although knowing how risky a shot is, will go for it to try to disrupt the bowler to allow him to get on top. Unfortuantely for him today, it didn't work.
Sarwan has done a good job though. They need to bat about 30 overs and get a lead of 200 to save the match. I don't think SA will be willing to chase anything more.