A higher-or-lower card streak. A card is shown and you call whether the next one is higher or lower (ties count in your favour). Keep calling correctly and you climb toward the prize — guess ten in a row to win the prize on your ticket. A single wrong call ends the run, so a winning ticket carries you all the way while a non-winning one trips up before ten.
A winning ticket carries you all ten; a non-winning one trips up before then.