so far for me has been 2
first is my spare ball, dynothane vendetta maxx, that thing never hooked, even when it hooked, never hit hard, too much deflection.
second is the lane master XSPower, tried different surface, nothing worked, gonna plug it and try it with a different drill
--------------------
When a house bowler misses the mark, misses the break point and strike, for many ppl its called a wallshot. When a pro does that its call adjustment

When a house bowler gets his finger stuck in the ball and fall on the lanes, for many ppl its called lame bowler. When a pro does that its called the Machuga flop! ha i like this one.