I've been trying to break my corolla for the past 8 months, the gear box only gave up this week. I've been ramming it through the gears with out using the clutch, forcing it into reverse while rolling forward, managing to get it into reverse three times. It makes some crunching noises. I find it very amusing to damage my cars especially when other people don't know what's going on, the look of horror on their faces. Anyway the reverse stopped working and the car would not drive forward, so I forced it to go forward and bust a piece of the gearbox casing, which then drained all the oil out of my gear box, but I still made the 40km journey home and swapped the gearbox. I did not have a chance to open the broken gearbox to see what happened yet.
I have a lot of experience with this kind of thing so I could keep rambling on about how much abuse some cars can take before breaking, that would suprise a lot of people.