yep....i play the piano.
i get a lot of those things...it's like a "bad music day" for me, hey i don't say that music is bad.
there are instances that i even forgot how to play
and sometimes i do get irritated because i can't even play something decent.hehe
well what i do is i take time to condition my mind in playing.
i think it's some sort of meditation...
i close my eyes,relax and think i will have a fruitful practice...
mind-set...
---kishimotto