Favorite Mario game glitches?

[Doodle]

What are your favorite glitches from past Mario games?
Super Mario 64 was pretty good, but it also had a lot of glitches. But they are glitches you pretty much have to sniff out on purpose or look up. But I love the glitches in Super Mario 64. :P
Flying through the castle and backwards long jumping up the stairs is awesome.

[Red]

http://www.youtube.com/watch?v=R1ANoyVHK5E

'Nuff said. I've done this glitch several times.

[Qsmash]

Super Mario World. Tons of secrets waiting to be unraveled.

[Shujinco2]

Well, Lets see:

- World -1
-Infinite lives (Found in various 2-d mario games)
-The one in sunshine with the clovers and the butt stomp that makes you fly REALLY high in the sky.
-The infinite star glitch. (SMRPG)
-Bully Humping! :D (SM64)

[Mutilator7]

The one red said and various super mario 64 glitches.

[Macawmoses]

Snaking for the outrage it causes.

[Nayrman]

the black room of death in 64
Snaking = fun galore pissing people off
the but stomp invincibility trick in all the 3D games... I mean really, that's just bad coding X_X:;

[Transient Link]

Super Mario World. Tons of secrets waiting to be unraveled.

I agree with you there. SMW was awesome.