Odd question about a broken string...

[perfect_pitch]

Yeah, first of all - it's not the first string I've broken, and probably won't be the last.

I've just broken the G (3rd string) & G# (1st string) 1 1/2 octaves before the top of the piano. Can anyone tell me from an engineering point of view, why then my C# which is a 4th octave above it has gone INSANELY out of tune when that keys strings seem perfectly intact???

Am I missing something??? Or is this a precursor to indicate which string might be next to snap???

[quantum]

All strings share the pinblock.  If a string breaks the balance of tension between all strings is shifted.  Wrap rubber bands around a box and take note of the tuning.  Now remove one rubber band, notice the difference?

[perfect_pitch]

Ahhh... okay. I guess that makes sense... it's just really annoying though.

And my piano tuner is still in London.