Power skids are a result of excessive power and typically occur on all the following surfaces EXCEPT:

Power skids occur when excessive acceleration causes the drive wheels of a vehicle to lose traction, leading to a loss of control. This typically happens on surfaces with less grip, such as snow, sand, and ice, where the tires can easily spin and lose traction due to the low friction between the tires and the surface.

On the other hand, black-top pavement provides a higher level of grip compared to the other surfaces listed. The asphalt material has more friction, which helps maintain traction even during acceleration. Therefore, while it is still possible to lose control on black-top pavement under extreme conditions, it is less likely to result in power skids as compared to slippery conditions where traction is significantly compromised. This is why black-top pavement is the exception in this context.