HALLANDALE BEACH, Fla. - Despite having closing day dampened by rain, the 2012-2013 Gulfstream Park meeting ended with a bang on Friday as bettors nationwide poured more than $5.2 million into a Rainbow 6 pool which totaled a record $7.24 million and rewarded winners with a $4,234.01 payoff. The entire pool, which began with a $1.9 million carryover, had to be dispersed on closing day.