Can't find the animation on the net anywhere... :(

Did find this though: (From "cows and easter eggs")

Capcombo: Shoot around the Mini-loop, and then backwards around the right orbit to the rollover-lanes. You will now see a moose kick a cow in the behind.

The playfield ball rack lights intermittently spell out T, O, N, Y (Tony Defeo was one of the engineers). TONY also flashes during attract mode.
A flipper button sequence (which I don´t know of) encodes Tony´s birthday and starts a freak-out mode with video animation (involving Tony´s face), lights and solenoid pops.

At the end of a game, hold both flippers before and during the moose animation for a fun sound effect.