What is Thunder?

Thunder is a coverall game and we give you a headstart on winning it.  Here's how:  We pull 48 numbers.  You buy your Thunder tickets for a $1 each, and mark the numbers we've called.  If you like your chances to win on your Thunder card, keep it.  If not, you can trade it in for a $1 and get two Thunder cards in return. We start calling with the 49th number and the first player to coverall wins $250.  Remember to yell "THUNDER!"