Apprentice jockey Bacarra Rice, 22, who moved her tack to Philadelphia Park in June, pulled a rare double Sept. 23 when she booted home two horses that each returned more than $100 to win for a $2 wager.Rice's first upset occurred in the fourth race, when 62-1 Gold Exchange, trained by Ladeana Bastida and owned by Just Do It Stables, won and paid $126.80. The second came in the ninth event, when Northcote Stable's Great Aunt Alice, trained by David Dotolo, won at 53-1 and paid $108.40.Rice said she knew both horses had poor form, but she tried to ride them as if they were the favorites."I tried to give both of them the benefit of the doubt," she said. "Another jockey told me that after I won with the second longshot everybody in the jock's room was making a lot of racket...they were hollering and carrying on."Said Rice, who rode at Penn National Race Course in Grantville, Pa., last winter: "It just goes to show you that you never know what might happen in a horse race."