Oh, yes...I remember this one..Also to do with freezing.
I was training Dratini/Dragonair.
So, I get it to lvl 40 odd.
Then, my bro walks past, catches the charger, and the DS goes flying off the table.
I pick it off the floor.
I look at it, and my hour of training is all frozen.
I hurt him REALLY bad for that one ><