I'll start and remember people theese are myths which are not real so don't try to do these in the game.These are only for fun.
Ghost-Walk around blue skies tiil midnight if you are by the trailer you can see a ghost look at you but it will disapeer in 5 seconds.
Big foot-At the football field wait till 1:50 and look towards the sign that used to say lets get em guys bigfoot will walk past.
Extra mission christmas in bullworth at christmas eve go to bullworth town you will see santa claus and a yellow marker no you have to go to chimdea to chimdea delivering presents when your done you will have a present as one of your trophys.( this mission happens around 12:30)
And remember these are not real they are here for fun and remeber you can makeup your own.