Traveler's diarrhea can happen to you when you least expect it, and it's caused by eating different foods that your body may not be used to; whether it's food that's been cooked in different oil or just a weird and exotic food like a grasshopper that you just had to try. Nonetheless, you'll have access to washrooms all the time, and if we have to pull an emergency stop . . . no problem! It happens to even the most seasoned of travel veterans.