#1. 'Secret' tracks at the end of music CD's that are normally completely superfluous, catch you off guard and leave you wandering if your stereo is bust during the innordinately long gap.

#2. Computers telling you that YOU didnt shut down properly after THEY crashed for no apparent reason.

#3. Domestic animal's sanitary habits.

#4. Waiters who come and ask you if everything is OK just after you've shovelled a large mouthful of food in.