Too long for glitch-related title

Full title: "Glitches in games that made the console do what was thought IMPOSSIBLE"

There's a TVTropes page called "Good Bad Bugs", & it made me think about a video about how a glitch in the Sega Genesis let developers(well, only Traveler's Tales made use of it as far as I know) be able to showcase MORE than 61 colors onscreen at once(link: www.youtube.com/watch?v=o8qgArSqMsc), & it got me thinking...

what about other examples of this? Well, I do know other stuff like that. For example, several composers found a glitch in the Commodore 64 that let them be able to add a FOURTH channel into the SID chip, & some people decided to use it to add in samples. Here are some examples:
Outrun Europa: www.youtube.com/watch?v=e3Ga2b0F18E
Hot Rod: www.youtube.com/watch?v=IRjvr9TMIUU
After Burner(US version, not the European version that European C64 owners got which was inferior, & didn't have this cool tune by Jeroen Tel): www.youtube.com/watch?v=mM-IdGE51f8
Skate Or Die(Rob Hubbard did this one, not Jeroen Tel): www.youtube.com/watch?v=-50h7SMI_Tg

Also, there's a glitch in LittleBigPlanet called the "3D bug" in which you can build with 50 more layers, & if used correctly, can make for some beautiful scenery. Well, it's not really "limit pushing", but when else am I going to mention this?

I'm curious if there are any other examples of this. This would be an interesting conversation.