Smokin Nitro, patiently brought along since his debut this spring, earned his sixth win from nine starts in his Maryland debut with a front-running upset of Friday's feature race at Laurel Park . Ridden by Angel Suarez for trainer Jamie Ness, Smokin Nitro ($15.60) covered 51/2 furlongs in 1 minute, 2.84 seconds over a Kelso turf course rated good to win by a length over Dubini, favored at 4-5 favorite in the open $55,000 entry-level allowance for 3-year-olds that drew a field of seven. In other action Friday, Gary and Mary West's Astounding ($4.80) was a gate-to-wire winner in Race 7, a $45,000 second-level optional claiming allowance for 3-year-olds and up, going 11/16 miles in 1:43.14 over the Kelso layout; and Mark Grier's Gotham Gala ($5.60) was a popular winner of Race 8, a $42,000 entry-level allowance for fillies and mares 3 and older. The winning time was 1:10.62 for 6 furlongs over a fast main track. Jockey Trevor McCarthy visited the winner's circle three times Friday, aboard Salt Pond ($5) in the fifth race, Astounding ($4.80) in the seventh and Silver Dagger ($4.60) in the 10th.