Language Aquisition

I was intrigued recently by the story about the Croatian girl who awoke from a coma speaking fluent German.
For those too lazy to read it, she was learning German but far from fluent, then ended up in a coma, how we aren't told. When she awoke however, she couldn't speak her native Croatian at all, but spoke only fluent German.

For me this is both intriguing and annoying, because it would appear that all the German that I've seen and heard is most likely in my head somewhere, I just can't get it out. Unless I'm drunk and talking to a taxi driver anyway.
Inducing a coma seems a bit of a drastic solution though, perhaps I should get my Suzuki GSX 750 back on the road....