One such tactic is "blocking," which is purposefully throwing out cards that keep opponents from finishing their hands. Players can decide which cards to let go by monitoring which cards their opponents are collectingslots of fun or discarding. Players use "hand reading," another sophisticated strategy, to infer the kinds of hands their opponents might be holding by observing their movements. This entails keeping an eye on opponents' decision-making speed and reactions to specific plays in addition to which cards are picked up or discarded. Players who master this ability are able to predict their opponents' movements and modify their tactics accordingly.