This occurred on an Egypt Air flight from Bombay to Cairo. As the meal service was being cleared the passengers began lining up for the lav's and the lines were at least 5 or 6 deep for what seemed like hours. Finally, no lines and I made my way to the head. I opened the door and found myself staring at a soggy and soiled Mount Everest of toilet paper. The tip of the mountain had to be a full 8 inches above the seat. I quickly shut the door, crossed the aisle and tried another one. While not as voluminous as the first, another mountain was growing. Nasty!