Skid>Hook>Roll Slo Mo Video

[bowl1820]

In this video clip you'll see the ball skid through the heads, flare up onto a second axis then roll into the pins on another axis.

When you understand what's going on you can make much more sense of what might, at first, appear to be a confused blur. Try to look only at the white dots placed on the ball.

1- In the first second, just after release and as as the ball skids through the heads, you'll see a steady piece of tape: the ball is rotating around the bowlers initial axis (the PAP, Positive Axis point)

2- After this, the axis will start to move, migrate, from the PAP towards the grip line and you'll see the second Axis settle down (if only briefly)

3- Finally, the ball will move off that axis immediately prior to rolling into the pocket for a perfect strike. Notice, at this point, that the ball has flared so much it is almost rolling over it's initial axis (first tape).


This shows about where the tracer tapes are placed.

[bowl1820]

2nd Video

[rv driver]

the videos are really helpful for me. The second one especially shows each axis. It's funny you can clearly see the axes migrate progressively from one to the next. This helps me a lot more than simply looking at lines drawn on a ball. Thanks!
Addendum: It appears as if the dot closest to the right of the thumb is the first axis; then the middle dot, then the furthest dot on the roll. (And upon inspecting the diagram, I see that this is so. The video helps me to understand how the release sets the ball in motion around its PAP, and then how the core differential shifts the ball appropriately.