Poker_Mike
Legend
Loyaler
If you were chasing a draw and you got there on the river it might be right to lead out. If he had a one or 2 pair hand and sees that the draw might have got there he would probably check it down. But if you make a small to moderate size bet he would in many instances 'pay to see'.
I agree with this post.
OR....if the card on the river completes an obvious draw you can lead out with a very big bet on the river to try to get your opponent to fold.
Good luck !