Bugs happen. And since games can be patched and fixed, I personally don't think a few aren't that big of a deal. They can be, however, very funny.
Take this one, which is what is apparently a recently discovered bug in Gran Turismo 5, a not-so-recently released game.
The bug was in Super GT: Eifel (Circuit) 106A /5 Laps download event, available earlier this summer.
Gran Turismo isn't just the real racing simulator, it's the real racing simulator to the centre of the earth.