Yeah you just get the "an error has occurred" message, also worth noting I think it could potentially mess up emunand, my emunand mess up up once after knocking the 3ds, I got the error has occurred message and then it just kept freezing on a back screen when I booted emunand, if I pressed the power button the "do you want to power off" screen would appear then it would freeze on the home screen text and not load the homescreen, I have seen people with this happen on retail 3ds's so I think it might actually be potential issue with how the 3ds deals with sudden cuts in power