my favorite is when someone who isnt experienced rumble picks to counter teemo. I always fight lvl 1 cuz i know that should be the only time u straight win a 1v1 without any miracles. but the counter picker doesn't know all the keys to winning the lane and the powerspikes for each champ. he just knows it is a champ that should win the lane typically :)
He didn't chose poorly, he just sucks.