Skids are just one example of "equipment assisted" misses. Another is when there is a problem with the table, such as a dead rail or a side pocket point sticking out. Most people are happy to assign some of the blame for the miss to the equipment, and I don't blame them.
Balls also have problems. One of the most remarkable examples of a player being bitten by an equipment problem is this scratch...
Bob,
In countless hours of play I have never seen a ball act like that on a table set up normally. I seem to recall you trying to duplicate it on that same table. Was it possible a blast of air from a fan, a central air and heat register, or opened door to have hit it?
That ball performance still seems impossible without some creative modifications somewhere.
Hu