I also think piano recitals in churches are the best idea by far.
Having a know-it-all sitting right behind you who audibly cringes (quick breath in, tsk'ing) at every mistake they hear, whispers those mistakes to their friend who doesn't understand this, and then explains to their friend all these mistake during the breaks.
2 when you desperatly wanted good seats, and you were told by the box office, "sorry, sold out", and when you arrive, sitting at the very back, and with a pillar in front of you, there you see, 10 empty seats in the front row!!!5 When performers play a boring encore, which totally kills the moment of walking out of the concert amazed by the final piece of the program, like why play a piece of virtuosic difficulty as the final piece , and then play the minute waltz as an encore, it spoils the moment for me.
Ok here's my contribution:1) This not purely piano but its my ultimate bug bear: politics in amateur orchestras where the conductor is so bad he couldnt even excite a pervert, and he's so pretentious with his head up his ****; and then there is the fuddy duddy "male" 1st violinist who is so terrible (probably didn't even practice) that you think the talented lady next to him probably should have been 1st violinist.2) Just about everyone in the audience likes to mass cough in the interval : I mean would they cough normally while watching TV. I think its like Pavlov's theory for concert goers3) small kids/babies should never be allowed in to the concert hall, or anyone else who makes too much noise during performance.4) music society snobs who havn't got a clue what they are listening to, but because the pianist is "well known", they are "marvellous" regardless of the fact that the pianist was boring, insufficiently prepared etc..5) Pianists that think they are god's gift! (e.g John Lill)
Someone with a cold snorting in the audience and then finally blowing their nose. yuckGetting the giggles for no reason and not being able to stop cracking up.
coughing!why the hell people cough so much at concerts? why? do they do it on purpose???
The pianist having a memory lapse (i recently went to a Pascal Roge piano recital and he forgot the last three pages of Debussy's 'Ondine'- I felt so embarrassed for him)
Having the majority of the audience stand for an ovation, while I sit there thinking, "That wasn't good enough for an ovation." Usually, the audience isn't really interested in the quality of the performance. (I stand anyways. Giving in to peer pressure...)
'jump over my knees, i'm not getting up again.'