Easter Eggs?

Does anyone saw some easter eggs in games? (For people who dont know, Its a thing who doesnt necesserly belongs here. Look exemple below.)

I saw one on GTA: SA (?) , I climbed up a Bridge and it was worte ''Theres no easter egg here, Go away''

And I dont know if its a glitch but, In Legend of Zelda : Majora Mask : Behind the mask seller You can see a Mario Bros Mask.

So what about you ?

OFF TOPIC : Theres actually an Easter Egg on http://www.google.com, Type ''Google Easter Egg'' and click on ''I'm feeling lucky'' and you will be on a stupid game with a bunny lol.

http://youtube.com/watch?v=5QCYCfY4GYU

I actually laughed really loud when I found it myself.

Yes, it is. I can also get the Party Grunt with you if you want

Edit: Ialso remember picking up a pair of flowers on GTA SA

I rather liked the angry grunt at the end of halo 3, the ring is coming to an end so hes just trying to get a lift off the chef. XD

There was also a couple of cool ones in Zelda, if you wacked a chicken over and over you'd get tons of chickens come and start attacking you. XD And you could run circles around the shop keeper, if you did it fast enough you could steal items from his shop.

There is that truck by the SS Anne in Pokemon red/blue/yellow.

There's quite a few in the Zelda games. In Majora's Mask if you look at the Horse Chick(cant remember her name) neck Bowser's Head is there on her Broach or w/e they are called.

In MGS on the gamecube there's Mario + Yoshi dolls.
On Ocarina of Time, where you go fishing, if you got it right you could take the NPCs hat of by casting your fishing rod at him. The hat would be on the hook then.