Avoiding the Midgar Zolom
When you must cross the marsh near the Chocobo Ranch, you are supposed to get a Chocobo. Get whatever you want from the ranch, then position yourself as far out into the marsh without actually stepping in it. Wait until the snake goes way off to the left and run straight across without looking back. You should make it in the nick of time. Note: Save before attempting this, as it may require more than one attempt.