uppercuts怎么打？？偶而能出来，网上查到的打法，不是很理解。
The Dwarf uppercut's done by tracing an enemy vertically up (i.e. from the tile below it to the tile above), you know you're doing it when you see the little "UPPERCUT" labels over the monster while you're tracing a path, each uppercut enemy takes an extra sword's worth of damage
