Tony Hawk's Pro Skater 4 Easter Egg - Hippo Fun 2

In the San Fransisco level, you may notice two binocular-type thingies on platforms. Jump onto either one of the platforms. A message will pop up saying to press the proper button.

The one on the left is a seemingly impossible game to help a sea lion escape a shark (go figure). The one on the right is a view of two [alcatraz] prisoners appearing to do the arm-locked part of the chicken dance (once again, go figure).

Enjoy :P