Editing Betting in poker (section)

====Mandatory straddles====
Straddling is voluntary at most cardrooms that allow it, however house rules can make straddling obligatory at times by using a special token (called "the rock") at the table.  Whoever is in possession of the "rock" is obliged to place a live straddle for double the big blind when they are in the UTG position.  The winner of the ensuing pot takes possession of the "rock" and is obliged to make a live straddle when the UTG position comes around to this player.  If the pot is split the "rock" goes to the winner closest to the left (i.e. clockwise) of the previous holder. This is very similar in principle to the "kill blind" of a kill game, but does not necessarily occur in the same circumstances, and the betting amounts do not have to be affected beyond the first round as in a kill game.