Originally Posted by foxo
Sound starnge..never even heard about it.
but I can't understand why a player that thinks he has the winning hand will allow this move ?
Because they can't know
that they have the winning hand - there's always at least one card to come and the hands have usually been turned face up when someone proposes this.
If it's a 55-45 type situation the person in the lead might be more inclined to take it. Maybe they're feeling charitable, maybe they can't afford to get sucked out on and are hoping for at least half the pot, maybe they own a Canadian circus, or maybe (probably the most likely reason) they just want someone to be more likely to let them run it twice on a future hand when they find themselves behind. Could be all sorts of things.
Obviously, if they've got the other player crushed, they'll turn it down most of the time. There was a hand in Season 1 of HSP where Barry Greenstein and Sam Farha got all in before the flop, Greenstein had AA and Farha had KK. Farha wanted to run it multiple times, Greenstein naturally said no, Farha flopped a king and Greenstein lost about a hundred grand.