The Flash Vol.2 #166
Barry Allen and the cops he is leading begin firing at Flash and Captain Cold. Cold freezes the bullets and they drop harmlessly to the ground. Mirror Master arrives and turns the cops to glass. Mirror Master tells the other two how he and Captain Cold struck a deal with another villain to destroy Flash. Following his instructions Mirror Master made an adjustment to his gun and used it on Flash, trapping the three of them in this mirror world. Mirror Master tells them he can get the three of them home, but he needs some equipment from a museum to do it. Wally threatens to break Mirror Master's arm and makes him change the cops back from their glass form.
Estimated Condition: VF/NM