What are the things that passengers do that really wind you up when you are driving? We all have our little pet hates and in most cases drivers make terrible passengers. If you ever get into my car please note the following:-

Don't touch my radio that includes turning it up or down.
Stop screaming at everything that comes towards us... hang on, no, it's me who does that. Erm... Sharp intakes of breath, or going "Oh my Goodness" and when I say "WHAT?!!??!!!!!" the answer comes "I've forgot to wash something" or something else that's completely unrelated to my driving and frightens the life out of me because I think maybe she's seen an out of control petrol tanker on a collision course with us that I've somehow missed.
Don't you just love it when someone draws on the on the condensation on your windows - the little smiley face comes back week after week.
Dont give driving advice either - I'm the one with the steering wheel. Back seat drivers are pests.
I especially hate it if I have my parents in the passenger seat. They leaps for the grab handle if you take even the merest change in course at more than 5mph. Bends that you could negotiate in the wet at 100mph are treated like downhill hairpins. And if you come off the pavement you really get some stick!....

Please note I always follow the direction on my driving licence. "tear along the dotted line...."