Spinning is so much cooler than not spinning.

There are three on POTC on disc 2.

1. Select "fly on the set" and click right twice when your pointer
is on "play all" to highlight the tooth on the skull, thats the
easter egg - pirates cave construction

2. Select "below deck" and click left twice when your pointer is
on "set sail" to highlight the skull on the medallion, thats the
easter egg - A computer animated mock up of the ship chase

3. Select "moonlight serenade" put your pointer on main menu then
click down twice to highlight the tooth on the skull and click,
thats the easter egg - an interview with Keith Richards.