Hostility, whose last four stakes appearances were in turf sprints, responded to a switch to dirt to upset Tuesday night's $75,000 Hancock County Handicap at Mountaineer Race Track.
Ridden for the first time by Rodrigo Madrigal Jr., the 5-year-old Hostility ($26) wired a field of eight fillies and mares in 57.10 seconds to defeat 8-5 favorite Revolutionary Act by 2 1/2 lengths.
In her most recent start, Hostility finished third after surrendering a two-length lead inside the eighth pole in a turf sprint at Atlantic City.